CN111166367A

CN111166367A - Shielding device and shielding method based on light field of beam splitter and X-ray inspection device

Info

Publication number: CN111166367A
Application number: CN202010191569.6A
Authority: CN
Inventors: 方明
Original assignee: HANGZHOU MEDNOVA MEDICAL TECHNOLOGIES CO LTD
Current assignee: HANGZHOU MEDNOVA MEDICAL TECHNOLOGIES CO LTD
Priority date: 2019-12-31
Filing date: 2020-03-18
Publication date: 2020-05-19

Abstract

The application discloses X-ray shielding device, X-ray shielding method and X-ray inspection device based on light field of beam light device, the X-ray shielding method comprises the following steps: determining an X-ray examined area of the examinee by adjusting the visible light field emitted by the X-ray emitting device; the shielding plate of the shielding device between the X-ray emitting device and the body of the detected person is adjusted, when the photosensitive module which synchronously moves with the shielding plate determines the visible light field area, the shielding plate stops moving, so that the size of the variable light transmission opening formed by the shielding plate is consistent with the visible light field area, and the size of the variable light transmission opening of the shielding device is consistent with the X-ray irradiation field area. The invention utilizes the visible light field to automatically adjust the size of the variable light-transmitting opening of the shielding device, thereby realizing the consistency of the size of the variable light-transmitting opening of the shielding device and the X-ray irradiation field area, and for operators of the X-ray inspection device, the operation steps can not be increased.

Description

Shielding device and shielding method based on light field of beam splitter and X-ray inspection device

Technical Field

The invention relates to the field of medical radiation protection, in particular to an X-ray shielding device, an X-ray shielding method and an X-ray inspection device based on a light field of a beam splitter.

Background

An X-ray machine is the most common medical imaging equipment in various hospitals. The X-ray machine has the greatest advantages that the X-ray machine is wide in application range, can image all human tissues of human beings, such as bones, the skull, the chest, the lung, joints and the like, is very convenient to use, short in imaging time, low in requirements on equipment operators, and low in purchase and maintenance cost. In contrast, the ultrasound device cannot be used for examination of bones, the skull, the chest and the lung, and the like; although nuclear magnetic resonance can also be used for examining most human tissues, the nuclear magnetic resonance examination apparatus is large in size, high in cost, long in examination time and low in spatial resolution. However, the X-ray machine has its obvious disadvantage that X-rays are ionizing radiation, and the radiation dose of the X-rays can cause harm to the health of human bodies.

At present, the common practice at home and abroad is to use an old-fashioned film X-ray machine or a new-fashioned digital X-ray machine to image the part of a detected person to be detected in a shielding room, and the shielding room has the function of preventing the scattered X-ray from having adverse effects on other people. And if the chest radiography needs to be carried out, the operator of the X-ray machine uses a beam light device on the X-ray machine to limit the X-ray to only irradiate the chest of the examinee. Although only the chest of the subject will be directly irradiated with the X-ray, the X-ray will be imaged with a large amount of scattered X-ray, and when the X-ray protection is not performed in place, the scattered X-ray will be scattered to the eyes, skull, lymph, gonad, etc. of the subject, which are sensitive to the X-ray, thereby adversely affecting the health of the subject. Unfortunately, most hospitals do not provide effective X-ray protection for the body parts of the subject that do not need to be examined when performing X-ray examination on the subject.

Disclosure of Invention

The invention provides an X-ray shielding device, an X-ray shielding method and an X-ray inspection device based on a light field of a beam splitter, which can carry out more effective X-ray shielding on parts of an inspected person which do not need to be inspected, and can not increase the workload of an operator so as to ensure that the parts of the body which do not need to be inspected are irradiated by the X-ray without scattering.

The embodiment of the invention provides a technical scheme as follows:

an X-ray shielding method based on a light field of a beam splitter comprises the following steps:

determining an X-ray examined area of the examinee by adjusting the visible light field emitted by the X-ray emitting device;

the shielding plate of the shielding device between the X-ray emitting device and the body of the detected person is adjusted, when the photosensitive module which synchronously moves with the shielding plate determines the visible light field area, the shielding plate stops moving, so that the size of the variable light transmission opening formed by the shielding plate is consistent with the visible light field area, and the size of the variable light transmission opening of the shielding device is consistent with the X-ray irradiation field area.

Optionally, the determining the visible light field region by using the photosensitive module specifically includes:

the edge position that mobilizable shield plate is close to variable printing opacity mouth is provided with photoelectric sensor, through removing the shield plate, detects that the light intensity changes, can confirm the wild region of visible light.

Optionally, at least two photoelectric sensors are arranged at the edge of each shielding plate close to the variable light-transmitting opening, and the at least two photoelectric sensors are parallel to the edge of the adjacent shielding plate, so that when all the photoelectric sensors detect that the light intensity changes, the visible light field area can be determined.

Optionally, at least two photoelectric sensors are arranged at the edge of each shielding plate close to the variable light-transmitting opening, and the at least two photoelectric sensors are parallel to the edge of the adjacent shielding plate, so that when at least one photoelectric sensor detects that the light intensity changes, the visible light field region can be determined.

Optionally, at least one photoelectric sensor is disposed at an edge of each shielding plate close to the variable light-transmitting opening, and when the at least one photoelectric sensor detects that the light intensity changes, the visible light field region can be determined.

Optionally, at least two photoelectric sensors are arranged at the edge of each shielding plate close to the variable light-transmitting opening, the at least two photoelectric sensors are perpendicular to the edge of the adjacent shielding plate, the perpendicular two photoelectric sensors form a differential photoelectric sensing module, and when the differential photoelectric sensing module detects that the light intensity is different, the visible light field area can be determined.

the edge position that mobilizable shield plate is close to variable printing opacity mouth is provided with the reflection of light district, and is provided with imaging module in shield assembly near X light emitting device one side, through removing the shield plate, acquires that reflection of light district has reflection of light to show as imaging module, can confirm the visual light field region.

The embodiment of the invention also provides an X-ray shielding device based on the light field of the beam splitter, which comprises: the X-ray shielding device comprises a shielding plate supporting structure, a movable shielding plate, power equipment for driving the shielding plate and a shielding plate motion controller, wherein the shielding plate is movably arranged on the shielding plate supporting structure and is driven to move by the power equipment;

the movable shielding plate is provided with a photosensitive module at the edge position close to the variable light-transmitting opening, and the shielding plate motion controller is electrically connected with the power equipment and the photosensitive module;

when the power equipment moves the shielding plate, the photosensitive module detects that the light intensity changes, the visible light field area can be determined, and the shielding plate motion controller controls the power equipment to stop moving the shielding plate, so that the size of the variable light transmission opening formed by the shielding plate is consistent with the visible light field area, and the size of the variable light transmission opening of the shielding device is consistent with the X-ray irradiation field area.

Optionally, the photosensitive module is a photoelectric sensor, at least two photoelectric sensors are arranged at the edge position of each shielding plate close to the variable light-transmitting opening, the at least two photoelectric sensors are parallel to the edge of the adjacent shielding plate, and when all the photoelectric sensors detect that the light intensity changes, or when at least one photoelectric sensor detects that the light intensity changes, the visible light field area can be determined.

Optionally, the light sensing module is a photoelectric sensor, at least two photoelectric sensors are arranged at the edge position of each shielding plate close to the variable light-transmitting opening, the at least two photoelectric sensors are perpendicular to the edge of the adjacent shielding plate, the two perpendicular photoelectric sensors form a differential photoelectric sensing module, and when the differential photoelectric sensing module detects that the light intensity is different, the visible light field region can be determined.

Optionally, a light reflecting area is arranged at an edge position of the movable shielding plate close to the light transmitting opening, the light reflecting area is a photosensitive module, an imaging module is arranged on one side of the shielding device close to the X-ray emitting device, and the visible light field area can be determined by moving the shielding plate and acquiring that the light reflecting area has light reflection display as the imaging module.

The embodiment of the invention also provides an X-ray inspection device based on the light field of the beam splitter, which comprises: the X-ray shielding device, the X-ray emitting device and the X-ray detecting device are arranged on the X-ray shielding device, wherein the X-ray shielding device is positioned between the X-ray emitting device and the X-ray detecting device, and the area between the X-ray shielding device and the X-ray detecting device is used for accommodating a subject.

The invention has the beneficial effects that:

because the shield plate can form the light transmission opening with variable size, when X-ray examination is needed to be carried out on a certain part of a human body, only the part needs to be positioned at the light transmission opening, X-ray passes through the light transmission opening to irradiate the part needing to be examined, and because of the shielding effect of the shield plate, the part needing not to be examined can be well shielded, the X-ray can not be radiated, the dosage of the X-ray received by the examined person is greatly reduced, and malignant tumors, particularly the incidence rate of the malignant tumors of the gland is reduced. Meanwhile, when the X-ray inspection device in the prior art is used for carrying out X-ray inspection on an examinee, a beam light device of the X-ray emission device can generate a beam of visible light, the visible light irradiates on the examinee to form a visible light field, and the size of the variable light transmission opening of the shielding device is automatically adjusted by utilizing the visible light field, so that the size of the variable light transmission opening of the shielding device is consistent with the X-ray irradiation field area. On one hand, the normal exposure of the part needing to be detected can be ensured while other non-detected parts of the detected person are protected, and on the other hand, for the operator of the X-ray examination device, the operation steps are not increased (for each detected person, a doctor only needs to open and adjust a beam light device to align the detected part of the detected person), so that doctors in a busy hospital and equipment operators of the X-ray examination device are more willing to use the equipment of the patent.

Description of the drawings:

FIG. 1 is a perspective view of an installation position of an X-ray inspection apparatus in a standing position according to an embodiment of the present invention;

FIG. 2 is a schematic plan view of an installation position of the standing X-ray inspection apparatus according to an embodiment of the present invention;

FIG. 3 is a perspective view of the installation position of the X-ray inspection apparatus for a bed according to the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an X-ray shield apparatus in accordance with one embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an X-ray shield apparatus according to another embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an X-ray shield apparatus according to another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an X-ray shield apparatus according to another embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an X-ray shield apparatus according to another embodiment of the present invention;

FIG. 9 is a schematic flow diagram of a reticle masking method in accordance with one embodiment of the present invention;

FIG. 10 is a schematic top view of an X-ray inspection apparatus according to another embodiment of the present invention;

FIG. 11 is a schematic structural view of an X-ray shield apparatus according to another embodiment of the present invention;

FIG. 12 is a schematic structural view of an X-ray shield apparatus according to another embodiment of the present invention;

FIG. 13 is a schematic flow chart of an X-ray shielding method according to another embodiment of the present invention.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The X-ray detection device of the embodiment of the invention can be an old-fashioned film X-ray detection device and can also be a novel digital X-ray detection device. Although the old film X-ray detection device is replaced by the digital X-ray detection device, the sensitivity of the detection device is improved, and on the other hand, the radiation dose of direct imaging obtained by the part to be examined of the examinee when the X-ray examination device images is reduced. However, since other non-examined parts of the subject's body are irradiated with scattered X-rays during imaging by the X-ray examination apparatus, the present invention is applicable to both film X-ray detection apparatuses and digital X-ray detection apparatuses.

In the embodiment of the invention, a shielding device is arranged between the X-ray emitting device and the examinee, the shielding device is provided with a variable light-transmitting opening, X-ray emitted by the X-ray emitting device irradiates the corresponding examined part of the examinee through the variable light-transmitting opening, and the rest scattered light is shielded by the shielding device. Due to the shielding effect of the shielding device, the part which does not need to be checked can be well shielded, and the X-ray scattered light can not be radiated, so that the X-ray dosage of the checked person is greatly reduced, and the incidence of malignant tumors, particularly glandular malignant tumors, is reduced.

However, although the shielding device can effectively reduce the X-ray dosage received by the subject, it is an additional step for the operator of the X-ray examination apparatus to align the variable light-transmitting opening of the shielding device with the corresponding examined part of the subject. For an operator (doctor) of an X-ray examination apparatus in a busy hospital, such as a hospital in the third family, an extra step may result in hundreds of additional steps a day, greatly increasing the workload of the operator. Therefore, the embodiment of the invention also discloses an X-ray inspection device and an X-ray shielding method using the X-ray inspection device, and the automatic alignment of the variable light-transmitting opening of the shielding device and the detected part corresponding to the detected object can be realized without adding extra steps by using the shielding method, so that the workload of equipment operators is greatly reduced, the diagnosis efficiency is improved, and the popularization rate of the equipment is also favorably improved.

When an existing X-ray examination device is used for carrying out X-ray examination on an examinee, before formal X-ray examination is carried out, a beam of visible light can be generated by a beam light device of an X-ray emission device, the visible light irradiates on the examinee to form a visible light field, and an operator adjusts based on the visible light field, so that the visible light field is consistent with the examined part needed by the examinee. During the subsequent formal examination, the beam-forming device of the X-ray emission device can generate a beam of X-ray with the same size to irradiate the required examined part of the examined person, wherein the X-ray irradiation field is completely the same as the visible light field adjusted before. By the method, an operator can conveniently determine the size and the range of the X-ray irradiation field emitted by the beam splitter.

The invention utilizes the visible light field to automatically realize the consistency of the variable light-transmitting opening of the shielding device and the visible light field area under the condition of not increasing additional operation, thereby realizing the consistency of the size of the variable light-transmitting opening of the shielding device and the X-ray irradiation field area. On one hand, the normal exposure of the part needing to be detected can be ensured while other non-detected parts of the detected person are protected, and on the other hand, for the operator of the X-ray examination device, the operation steps are not increased (for each detected person, a doctor only needs to open and adjust a beam light device to align the detected part of the detected person), so that doctors in a busy hospital and equipment operators of the X-ray examination device are more willing to use the equipment of the patent. Meanwhile, the shielding device based on the light field of the beam splitter is more accurate than the light passing opening of other automatic or manual X-ray shielding devices, and is beneficial to further reducing the radiation dose of the examinee.

Therefore, the shielding device and the shielding method not only can enable more hospitals to be willing to use the shielding device due to the convenience and accuracy of the use of the shielding device and can further reduce the radiation dose of the examinee and reduce the harm of radiation to the health of the examinee.

The existing X-ray machine generally has two main use scenes: standing position and bed position. Generally, the device is used for standing up when photographing the chest, lung, cervical vertebra, thoracic vertebra, lumbar vertebra, head and other parts of a human body. If a patient with fracture or weak and sick needs to take X-ray pictures, the examinee is inconvenient or unable to stand, and a bed is generally used. The examinee can sit or lie on the special examining table of the X-ray machine to carry out X-ray film examination.

Therefore, as shown in fig. 1 to 2, an embodiment of the present invention provides an X-ray inspection apparatus in a standing position, including: the X-ray shielding device 100, the X-ray emitting device 200 and the X-ray detecting device 300, wherein the shielding device 100 is positioned between the X-ray emitting device 200 and the X-ray detecting device 300, and the area between the shielding device 100 and the X-ray detecting device 300 is used for accommodating the examinee 400, and the X-ray shielding device 100 is provided with a variable light-transmitting opening 160. The X-ray emitting device 200 includes a bulb 220 and a beam splitter 210. The irradiation range of the X-ray emitted from the bulb 220 is limited by the beam splitter 210, the X-ray is then irradiated to the examined part of the examinee 400 through the variable light-transmitting opening 160 of the X-ray shielding apparatus 100, and the X-ray finally reaches the detector 310 after passing through the examined part of the examinee 400, thereby completing the imaging.

As shown in fig. 3, an X-ray examination apparatus for a bed according to an embodiment of the present invention includes: an X-ray shielding apparatus 100 ', an X-ray emitting apparatus 200 ' and an X-ray detecting apparatus 300 ', the X-ray detecting apparatus 300 ' being installed under an examination bed 310 ', wherein the shielding apparatus 100 ' is located between the X-ray emitting apparatus 200 ' and the X-ray detecting apparatus 300 ', a subject lies on the examination bed 310 ' at the time of examination, the X-ray shielding apparatus 100 ' is moved to between the subject and the X-ray emitting apparatus 200 ', and the X-ray shielding apparatus 100 ' has a variable light transmitting opening 160 '.

Compared with the prior art, the X-ray inspection apparatus of the embodiment of the invention is mainly added with the shielding device, and the shielding device can be applied to both the standing X-ray inspection apparatus and the bed X-ray inspection apparatus, so the following embodiment mainly uses the standing X-ray inspection apparatus as an example to explain the technical scheme of the invention, but not to limit the patent protection scope of the invention, and all the equivalent structural changes made by using the description and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and are included in the protection scope of the invention in the same way.

Referring to fig. 4, an X-ray shielding apparatus 100 according to a first embodiment of the present invention is shown. The shielding device 100 includes an upper shielding plate 111A and a lower shielding plate 111B for shielding X-rays, and both the upper shielding plate 111A and the lower shielding plate 111B can effectively block X-rays. In this embodiment, the shielding plate is made of a rigid material, and in other embodiments, the shielding plate may also be made of a flexible material or a shielding plate made of a mixture of a rigid material and a flexible material.

The shielding plate can be made of a heavy metal plate, such as a lead plate, or can also be made of lead-containing glass, or a lead-containing cloth or rubber material, such as a lead cloth commonly used for radiation protection lead clothing, or a lead rubber commonly used for protection of a security inspection machine, or a telescopic projection curtain. In other embodiments, the shielding plate may also be a roller blind, a venetian blind, a roman blind, a honeycomb blind, or the like. Since the way of implementing the rigid shield plate and the flexible shield plate is various, it is not described in detail in this document.

The upper and

lower shielding plates

111A, 111B are fixed to two hanging

bars

112A, 112B, the hanging bars 112A, 112B are connected to a moving column 118, and both the upper and lower X-ray shielding plates can move up and down along the column 118. The upper end of the hanging rod 112B and the lower end of the X-ray shielding plate 111A constitute a variable light transmitting port 160 through which X-rays can pass. The height position and the opening size of the variable light transmission opening 160 can be changed by adjusting the height position of the hanging

rods

112A and 112B.

The hanging

rods

112A, 112B and the upright 118 can move relatively. In order to enable the two to automatically slide on the upright 118, a power device may be mounted on the upright 118 or the hanging

rods

112A and 112B, the power device may be configured as an electric cylinder, a hydraulic cylinder, a push rod, a worm gear, or the like, or the hanging

rods

112A and 112B and the upright 118 may be relatively moved by other electromagnetic or pneumatic devices such as a stepping motor. Of course, in other embodiments, the power equipment need not be installed if it is moved manually.

In embodiments of the invention, the shield panels are supported by movable uprights 118, which in other embodiments may be fixed, or may be supported by a frame structure, or by a ceiling structure.

In this embodiment, the upper and lower

X-ray shielding plates

111A, 111B are offset from each other (similar to a sliding door structure of a home bathroom), and the two X-ray shielding plates may be partially overlapped. In other embodiments, the upper and lower X-ray shielding plates are located on the same plane.

The shielding device 100 is further provided with a photosensitive module, and the photosensitive module is used for determining the visible light field area. In the present embodiment, referring to fig. 4, the photosensitive modules are two photoelectric sensing modules 115A and 115B, and are disposed at the upper end of the hanging rod 112B and the lower end of the X-ray shielding plate 111A, i.e. above and below the light-variable light-transmitting opening 160. The two photoelectric sensing modules 115A and 115B move up and down together with the

shielding plates

111A and 111B, and thus the optical edge of the visible light field 150 (generally rectangular, as shown by the dotted line rectangle in fig. 4) emitted by the beam splitter can be detected in real time. Before the formal examination, the operator of the X-ray examination apparatus irradiates the visual light field emitted by the beam light device to the examined part of the examinee, and the light side of the visual light field emitted by the beam light device is brighter inside and darker outside. By changing the position and size of the visible light field emitted by the beam light device, the imaging range of the X-ray examination device can be accurately consistent with the examined part of the examined person. And because the visible light field inside that the bundle of light ware sent is brighter, when two photoelectric sensing modules 115A, 115B reciprocated, will detect the light edge of the visible light field that the bundle of light ware sent. At this time, the two photoelectric sensing modules 115A and 115B give the upper and lower positions of the light edge of the light field of the current beam splitter, so as to obtain the region information of the visible light field.

In this embodiment, the X-ray inspection apparatus further includes a shield plate motion controller (not shown) connected to the photosensitive module and a power device for moving the X-ray shield plate. When the power equipment drives the shielding plate to move, the photoelectric sensing module of the photosensitive module detects that the light intensity is from weak to strong, the control module immediately controls the power equipment to stop transmission when the light intensity is detected, the shielding plate stops moving, the upper end of the hanging rod 112B and the lower end of the shielding plate 111A are just positioned at the upper light edge and the lower light edge of the visible light field 150, and the size of a variable light-transmitting opening formed by the shielding plate is consistent with the visible light field area. In the present invention, the size of the variable light transmission opening is consistent with the visible light field region, and is not necessarily completely consistent, but the width or height of the variable light transmission opening is consistent with the visible light field region in an adjustable direction. In this embodiment, the size of the variable light-transmitting opening is consistent with the visible light field region, which means that the height and the position of the variable light-transmitting opening are consistent with the height and the position of the visible light field region.

In this embodiment, when the photoelectric sensing module of the photosensitive module detects that the light intensity is from weak to strong, the control module immediately controls the power device to stop transmission and the shielding plate immediately stops moving when the photoelectric sensing module detects that the light edge of the visible light field emitted by the beam light device is detected. However, due to the delay of data processing and the inertia of the power equipment, the shielding plate may not be immediately stopped moving, and may still move forward by one or two centimeters, so that the photoelectric sensing module may completely enter the X-ray irradiation field, and the photoelectric sensing module is easily damaged by long-term X-ray irradiation. Therefore, after the movement of the shielding plate is stopped, the shielding plate is slightly moved back to a certain distance, so that the edge of the shielding plate is just completely attached to the X-ray irradiation field. Therefore, the stop of the movement of the shielding plate according to the embodiment of the present invention includes not only the case where the movement of the shielding plate is immediately stopped but also the case where the shielding plate is slightly moved back by a certain distance after the movement of the shielding plate is stopped.

The X-ray emitted by the X-ray emitting device irradiates the corresponding examined part of the examined person through the variable light-transmitting opening, and scattered light above or below the examined part is shielded by the shielding device. Because X-ray mainly influences the glands of a human body, when the chest X-ray examination is carried out, due to the shielding effect of the upper shielding device and the lower shielding device, the parts (particularly the glands such as lymph, gonad and the like) which do not need to be examined can be well shielded, the X-ray can not be radiated, and the X-ray dosage of the examined person, particularly the incidence rate of malignant gland tumors, is greatly reduced.

In other embodiments, the shielding of the X-ray can be realized only by two movable shielding plates on the left and right, or by four movable shielding plates on the upper, lower, left and right.

In this embodiment, the photo sensor module 115A is specifically a plurality of photo sensors, and is located at the lower end of the X-ray shielding plate 111A, and the plurality of photo sensors are parallel to the edge of the adjacent shielding plate. The photoelectric sensing module 115B is specifically a plurality of photoelectric sensors, and is located at the upper end of the hanging rod 112B, and the plurality of photoelectric sensors are parallel to the upper edge of the hanging rod. When all the photoelectric sensors detect that the light intensity changes, the up-down position information of the light edge can be determined, and therefore the visible light field area can be determined.

Each photoelectric sensing module has the following advantages that the plurality of photoelectric sensors are arranged:

1) the detection range of each photoelectric sensing module is increased. When the light field of the beam splitter is small and the light field of the beam splitter deviates from the central axis, if only one photoelectric sensor is arranged on each photoelectric sensing module, the light field of the beam splitter may not be detected. Such a problem can be effectively dealt with if each of the photoelectric sensing modules includes a plurality of photoelectric sensors. Of course, the beam splitter light field is relatively small and the beam splitter light field is off-center from the central axis, which is a low probability of occurrence in practical applications, so in other embodiments, it is also feasible to use a single photosensor for each photosensor module.

2) The detection redundancy of each photoelectric sensing module is increased. If a part of the photoelectric sensors in the photoelectric sensing module are damaged, the photoelectric sensing module can normally work as long as the rest photoelectric sensors can also normally work, so that the long-term reliability of the system is greatly improved. Therefore, in other embodiments, when the at least one photoelectric sensor detects that the light intensity changes, the up-and-down position information of the light edge can be determined, so that the visible light field region can be determined.

In this embodiment, two thresholds are preset, namely, a first threshold corresponding to the light intensity when the illumination light from the X-ray examination room is converted into the field of the beam splitter, and a second threshold corresponding to the light intensity when the illumination light from the beam splitter is converted into the illumination light from the X-ray examination room. Although these two thresholds are not difficult to determine, implementation requires a certain experience of the installation engineer. If the X-ray inspection room is decorated or the illuminating lamp is adjusted, the corresponding threshold value needs to be adjusted to adapt to the new illumination intensity.

In order to further simplify the detection of the light edge of the light field of the beam splitter by the photoelectric sensing module, other embodiments of the present invention may also use a differential detection technique to accurately detect the light edge of the light field of the beam splitter. At least two photoelectric sensors are positioned at the lower end of the X-ray shielding plate 111A, at least two photoelectric sensors are positioned at the upper end of the hanging rod 112B, and the at least two photoelectric sensors are perpendicular to the edge of the adjacent shielding plate, namely the arrangement direction of the photoelectric sensors is the same as the moving direction of the shielding plate.

Referring to fig. 5, in the present embodiment, two

photosensors

1521 and 1522 are arranged in an up-down manner to form a pair of differential photosensors. When the light field 150 of the beam splitter is positioned as shown in the first case of fig. 5, both

photosensors

1521, 1522 detect high light intensities, and the difference between the two is very small. When the light field 150 of the beam splitter is located as shown in the second case of fig. 5, the light intensities detected by the two

photosensors

1521, 1522 are very different, and the difference between the two light intensities can be very large. When the position of the light field of the beam splitter is as shown in the third case of fig. 5, both

photosensors

1521, 1522 detect low light intensities, and the difference between the two can also be very small. Therefore, it is not necessary to use the absolute value of the light intensity to determine whether the photosensor is located inside or outside the field of the beam splitter or on the light edge. People only need to judge whether the light intensity detected by the differential photoelectric sensor is greatly different, and then can directly judge the position of the light edge.

A typical photo sensor module has only one photo sensor in the moving direction. The differential photoelectric sensor is configured with two photoelectric sensors in the moving direction of the photoelectric sensing module. If the photoelectric sensing module needs to move up and down to detect the upper light edge or the lower light edge of the light field of the beam splitter, two photoelectric sensors need to be arranged in the up-down direction. If the photoelectric sensing module needs to move left and right to detect the left light edge or the right light edge of the light field of the beam splitter, two photoelectric sensors need to be arranged in the left and right directions. A certain distance is required between the two photosensors. Of course, in other embodiments, each differential photo-sensing module may also contain several pairs of differential photo-sensors, which are used for the purpose of extending the detection range and increasing the redundancy of the system.

In another embodiment, please refer to fig. 6, another shielding device with two upper and lower sheets is further provided. The upper and

lower shielding plates

121A, 121B are fixed to two

movable posts

128A, 128B, and both the upper and lower X-ray shielding plates can move up and down along the two posts. The photo-

sensing blocks

151A, 151B are disposed at the edge positions of the shielding plates near the variable light transmission openings. The two

photoelectric sensing modules

151A and 151B can detect the light edge of the visible light field emitted by the beam light device in real time by moving up and down together with the shielding plate.

In another embodiment, please refer to fig. 7, an X-ray shielding apparatus with four pieces, i.e., upper, lower, left, and right, is further provided. The four-piece type shielding device is similar to the X-ray shielding device in figure 4. The upper, lower, left and right X-ray shielding plates can effectively block X-rays. The upper, lower, left and right

X-ray shielding plates

121A, 121B, 121C, 121D are each fixed to a movable column 138, and the upper, lower, left and right

X-ray shielding plates

121A, 121B are each movable up and down along the column 138. The two left and right

X-ray shielding plates

121C and 121D can move left and right. The four

X-ray shielding plates

121A, 121B, 121C, and 121D can enclose a variable light-transmitting opening 315 that can be varied in size. The four

photoelectric sensing modules

151A, 151B, 151C and 151D are arranged at the edge positions of the shielding plate close to the variable light transmission openings, and the four photoelectric sensing modules and the X-ray shielding plate move up and down and left and right, so that four light edges of a visible light field emitted by the light beam splitter can be detected in real time, and position information of the light edges of the current light beam splitter can be obtained. The position information of the light edge can be used to control and adjust the position of the X-ray shielding plate, so that the visible light fields of the variable light-transmitting opening 160 and the light beam generator are basically consistent.

In another embodiment, please refer to fig. 8, another shielding device with four sheets, i.e., up, down, left, and right, is provided. This four-piece type shielding apparatus is similar to the shielding apparatus of fig. 6, and the only difference is that the four

X-ray shielding plates

121A, 121B, 121C, 121D are mounted in a movable frame 148. The four

X-ray shielding plates

121A, 121B, 121C, and 121D are rectangular and can effectively block X-rays. The two upper and lower

X-ray shielding plates

121A, 121B can move up and down along the frame, the two left and right

X-ray shielding plates

121C, 121D can move left and right along the frame, and the upper, lower, left and right

X-ray shielding plates

121A, 121B, 121C, 121D can form a variable light-transmitting opening 160 with a variable size. The four

photoelectric sensing modules

151A, 151B, 151C and 151D are arranged at the edge positions of the shielding plate close to the variable light transmission openings, and the four photoelectric sensing modules and the X-ray shielding plate move up and down and left and right together, so that four light edges of visible light fields emitted by the light bundling device can be detected in real time. The position information of the light edge, up, down, left and right can be used to control and adjust the position of the

X-ray shielding plates

121A, 121B, 121C and 121D, so that the light field of the variable light-transmitting opening and the light beam device can be basically consistent.

In this embodiment, the variable light transmission opening 160 is substantially rectangular or square, in other embodiments, the variable light transmission opening may be diamond-shaped or have other shapes, because the illumination shape of the beam splitter of the X-ray apparatus is now substantially rectangular or square, and of course, the illumination shape of a small number of beam splitters is other shapes such as diamond-shaped, so the shape of the variable light transmission opening may be diamond-shaped or have other shapes. Meanwhile, in order to prevent the variable light-transmitting opening from being excessively reduced and clamp the hand in the use process, the device is also provided with an anti-clamping device, so that the hand can not be clamped and injured by the variable light-transmitting opening.

Based on the above X-ray shielding apparatus and X-ray inspection apparatus, an embodiment of the present invention further provides an X-ray shielding method based on a light field of a beam splitter, and please refer to fig. 9, which specifically includes:

step S101, determining an X-ray examined area of an examinee by adjusting a visible light field emitted by an X-ray emitting device;

step S102, a shielding plate of the shielding device between the X-ray emitting device and the body to be detected is adjusted, when the photosensitive module which moves synchronously with the shielding plate determines the visible light field area, the shielding plate stops moving, so that the size of a variable light transmission opening formed by the shielding plate is consistent with the visible light field area, and the size of the variable light transmission opening of the shielding device is consistent with the X-ray irradiation field area.

Specifically, step S101 is executed, after the subject stands behind the X-ray shielding device, the shielding plate is opened to a larger range, the X-ray emitting device emits a visible light beam, the visible light beam irradiates the subject to form a visible light field, and an operator of the X-ray examination device adjusts based on the visible light field, so that the visible light field is consistent with a part of the subject to be examined, which is required by the subject. During the subsequent formal examination, the beam-forming device of the X-ray emission device can generate a beam of X-ray with the same size to irradiate the required examined part of the examined person, wherein the X-ray irradiation field is completely the same as the visible light field adjusted before. By the method, an operator can conveniently determine the size and the range of the X-ray irradiation field emitted by the beam splitter.

And S102, after the visible light field is determined, the power equipment is utilized to drive the shielding plate to gradually approach, when the photosensitive module which synchronously moves with the shielding plate detects that the light intensity changes, the light edge of the visible light field region can be determined, and the shielding plate stops moving, so that the size of the variable light-transmitting opening formed by the shielding plate is consistent with that of the visible light field region, and the size of the variable light-transmitting opening of the shielding device is consistent with that of the X-ray irradiation field region. The stop of the movement of the shielding plate in the embodiment of the invention includes not only the case that the movement of the shielding plate is stopped immediately, but also the case that the shielding plate slightly moves back for a certain distance after the movement of the shielding plate is stopped.

In other embodiments, after the visible light shadow is determined, the shielding plates can be gathered together, then the power equipment is used for driving the shielding plates to gradually get away, when the photosensitive module which moves synchronously with the shielding plates detects that the light intensity changes, the light edge of the visible light field area can be determined, the shielding plates stop moving, the size of the variable light transmission opening formed by the shielding plates is consistent with the visible light field area, and therefore the size of the variable light transmission opening of the shielding device is consistent with the X-ray irradiation field area.

In this embodiment, since each shielding plate is provided with a plurality of photosensors near the edge of the variable light-transmitting opening, and the photosensors are parallel to the edges of the adjacent shielding plates, when all the photosensors detect that the light intensity changes, for example, from weak light to strong light, the visible light field area can be determined.

In other embodiments, the visible light field region may also be determined when at least one photosensor detects a change in light intensity, such as a change from low light to high light.

In other embodiments, when the edge position of each shielding plate close to the variable light-transmitting opening is provided with at least two photoelectric sensors, and the at least two photoelectric sensors are perpendicular to the edge of the adjacent shielding plate, the perpendicular two photoelectric sensors form a differential photoelectric sensing module, and when the two photoelectric sensors of each differential photoelectric sensing module detect that the light intensities are different, the visible light field region can be determined.

When the size of the variable light-transmitting opening of the shielding device is adjusted to be consistent with the X-ray irradiation field area, an operator of the X-ray inspection device can open the X-ray inspection device to perform X-ray inspection.

Referring to fig. 10, an embodiment of the present invention further provides an X-ray shielding apparatus, wherein the

photoelectric sensing modules

155A and 155C and the

X-ray shielding plates

121A, 121B, 121C and 121D are independently disposed, the

photoelectric sensing modules

155A and 155C are respectively installed on two vertical sliding

slots

157A and 157B, and an independent power device enables the

photoelectric sensing modules

155A and 155C to directly move on the sliding slots. When the light field of the beam light device needs to be detected, the two

photoelectric sensing modules

155A and 155C can slide up and down, left and right along the sliding

grooves

157A and 157B. The two sets of sliding

grooves

157A and 157B are arranged in tandem in space so that the

photoelectric sensing modules

155A and 155C do not affect each other when sliding.

Two

photoelectric sensing modules

155A and 155C are used in this up-down, left-right, four-piece X-ray shielding apparatus shown in fig. 10. This has the advantage that two opto-electronic sensing modules are saved. The disadvantage is that each of the photo-

electric sensor modules

155A and 155C needs to move a large range to be able to detect two light edges above and below and two light edges to the left and right of the light field of the beam splitter.

In other embodiments, four photoelectric sensing modules can be optionally used, and one photoelectric sensing module is respectively mounted on the upper side, the lower side, the left side and the right side. Each photoelectric sensing module only needs to find one light edge in the upper, lower, left and right sides of the light field of the beam splitter within a small moving range, so that four light edges of the light field of the beam splitter can be rapidly determined, and the X-ray inspection efficiency is improved.

In this embodiment, each of the photoelectric sensing modules includes a plurality of photoelectric sensors, and the plurality of photoelectric sensors are parallel to the edge of the adjacent shielding plate, and when all the photoelectric sensors detect a change in light intensity, the light edge of the visible light field region can be determined, and the region information can be acquired.

In other embodiments, each of the photoelectric sensing modules includes a plurality of photoelectric sensors, at least two of the photoelectric sensors are perpendicular to the edge of the adjacent shielding plate, the perpendicular two photoelectric sensors form a differential photoelectric sensing module, and when the differential photoelectric sensing module detects that the light intensities of the two photoelectric sensors in each of the differential photoelectric sensing modules are different, the light edge position of the visible light field region can be determined, and the region information can be obtained.

Referring to fig. 11 and 12, another X-ray shielding apparatus is further provided in an embodiment of the present invention, wherein the shielding apparatus utilizes an imaging module to obtain a visible light field region. The imaging module may be one or more wired or wireless cameras.

Referring to fig. 11, fig. 11 is a top view similar to the top, bottom, left and right four-piece X-ray shielding device in use. The X-ray emitting device in fig. 11 includes an X-ray machine bulb 220 and a beam splitter 210. The X-ray tube 220 emits X-rays, which are directed to the subject 400 after passing through the beam splitter 210. The X-rays pass through the variable light-transmitting opening 160 in the shielding device 110 before reaching the examined region of the examinee 400.

In the present embodiment, the imaging modules include imaging modules 170A, 170B mounted on the X-ray shielding structure 110 and imaging module 170C mounted on the X-ray emitting device. The

imaging modules

170A, 170B, 170C need to be able to completely image the variable light-transmitting opening 160 of the shielding device, so as to obtain specific position information of the visible light field.

In other embodiments, the

imaging modules

170A, 170B, or 170C may be used alone to completely image the variable light-transmitting aperture 160 of the shielding device, or some combination of the

imaging modules

170A, 170B, or 170C may be selected. Two or more imaging modules are used to allow the system to have sufficient system redundancy. In the event of a problem with

imaging module

170A, 170B, or 170C, it is ensured that the patented system is still able to function properly. In addition, the placement position of the imaging module shown in fig. 11 is only an example. Those skilled in the art can place the imaging module at other positions capable of completely imaging the variable light-transmitting opening 160 according to the needs of practical application, so as to obtain the specific position of the visible light field and obtain the region information.

In order to make the imaging module more convenient to capture the variable light-transmitting opening in the X-ray shielding device, the embodiment of the invention attaches the light-reflecting

strips

153A, 153B, 153C, 153D to the four sides of the

shielding plates

121A, 121B, 121C, 121D constituting the variable light-transmitting opening, as shown in fig. 12.

Before taking X-ray film, the operator of the X-ray examination device opens the beam light device to aim the visible light field of the beam light device at the examined part of the examined person. At this point, the imaging module is able to capture an image of the frame 168 of the shielding device and the field of the beam splitter. At the beginning, the four

shielding plates

121A, 121B, 121C, 121D are assumed to open the variable light transmission opening 160 to the maximum, and the visible light field of the beam splitter can be fully projected to the examined part of the examined person through the variable light transmission opening 160. After the light field adjustment of the beam splitter is completed, the four

shielding plates

121A, 121B, 121C, and 121D gradually move toward the middle, i.e., the variable light-transmitting opening 160 gradually decreases. When the variable light-transmitting opening 160 gradually enters the visible light field of the light bundling device, the

light reflecting strips

153A, 153B, 153C and 153D attached to the four sides of the

shielding plates

121A, 121B, 121C and 121D reflect the light of the light field of the light bundling device to the imaging module, and the imaging module determines the visible light field area after acquiring the reflected light image, so that the area information is acquired. For example, the reflective strip on the left shielding plate forming the variable light-transmitting opening enters the light field of the light beam splitter first, a bright edge appears at a corresponding position in a reflective image obtained by the imaging module, and the position of the shielding plate at the moment is obtained, so that the position of the left side line of the visible light field of the light beam splitter can be obtained. Similarly, after the right shielding plate, the upper shielding plate, or the lower shielding plate enters the light field of the light splitter, a bright edge appears in the reflected light image obtained by the imaging module at the corresponding position, and the positions of the right shielding plate, the upper shielding plate, and the lower shielding plate at this moment are obtained, so that the positions of the right side, the upper side, and the lower side line of the visible light field of the light splitter can be obtained, as shown in the four images below fig. 12. After the area information of the visible light field area is obtained, the motion controller controls the power equipment to move the shielding plate by utilizing the area information, so that the size of the variable light-transmitting opening formed by the shielding plate is consistent with the visible light field area, and the size of the variable light-transmitting opening of the shielding device is consistent with the X-ray irradiation field area.

In the embodiment of the invention, the position corresponding to the initial bright edge is obtained by the imaging module and is used as the side line of the visible light field area of the beam splitter. In another embodiment, the position information corresponding to the power device or the position information corresponding to the shielding plate at the time when the bright edge appears may be used as the area information of the visible light field area.

Of course, in practical application, the light fields of the beam splitters can enter the upper, lower, left and right shielding plates simultaneously or separately. However, it is very easy to detect several bright light edges simultaneously for the image recognition technology, and the details are not repeated here.

In other embodiments, in order to enable the imaging module to more accurately capture the size of the visible light field in the X-ray shielding device, light reflecting strips with alternate brightness and darkness may be attached to four sides constituting the visible light field. The light reflecting strips with alternate brightness are easier to identify and position in the image.

In other embodiments, other retroreflective strips that are easily identified and located in the image may be used. For example, colored retroreflective strips, such as red or green retroreflective strips, or even red-black alternating, or yellow-black alternating retroreflective strips, may be used. These retroreflective strips will appear very distinct in the image and are therefore more easily identified and located in the image. How to identify the bright stripes, or the bright and dark stripes, or the colored stripes in the image is the most basic problem of image identification, and details are not repeated herein.

In other embodiments, the shielding device has a movable reflector, the reflector replaces the reflector of the above embodiments, the reflector is connected to the power equipment, the reflector can move between the inspection position and the non-inspection position of the X-ray, and the reflector and the shielding plate move independently. When the X-ray detected area is determined by the visible light field, the reflector is moved to the approximate X-ray detected area, the strong luminescence generated in the area is acquired by the imaging module, and the visible light field area can be determined by the imaging module to acquire the area information. And controlling the power equipment to move the shielding plate by using the area information by using the motion controller, so that the size of the variable light-transmitting opening formed by the shielding plate is consistent with the visible light field area, and the size of the variable light-transmitting opening of the shielding device is consistent with the X-ray irradiation field area.

In other embodiments, there is no need to additionally provide a reflective strip on the shielding plate, and one side of the movable shielding plate close to the X-ray emitting device is used as a reflective plate, and a layer of highly reflective paint may be coated on one side of the shielding plate close to the X-ray emitting device, or only by adjusting the material of one side of the shielding plate close to the X-ray emitting device, diffuse reflection may be formed on one side of the shielding plate close to the X-ray emitting device. At the beginning, the variable light-transmitting opening is opened to the maximum by the shielding plate, and the visible light field of the beam light device can be ensured to be projected to the examined part of the examined person through the variable light-transmitting opening. And after the visible light field is determined, the power equipment is utilized to drive the shielding plates to be combined together, the visible light field is formed on one side of the shielding plates close to the X-ray emitting device, and the imaging module is utilized to acquire the region information of the visible light field at the moment. Because the illumination light of the X-ray examination room and the light intensity of the light field of the beam light device are greatly different, the area of the visible light field of the beam light device can be distinguished through a high-sensitivity image recognition algorithm, and further the area information of the visible light field can be obtained. After the area information is obtained, the motion controller controls the power equipment to move the shielding plate by utilizing the area information, so that the size of the variable light-transmitting opening formed by the shielding plate is consistent with the visible light field area, and the size of the variable light-transmitting opening of the shielding device is consistent with the X-ray irradiation field area.

Based on the above X-ray shielding apparatus and X-ray inspection apparatus, another X-ray shielding method based on the light field of the beam splitter is further provided in the embodiments of the present invention, please refer to fig. 13, which specifically includes:

step S201, determining an X-ray examined area of the examinee by adjusting the visible light field emitted by the X-ray emitting device;

step S202, determining a visible light field area by using a photosensitive module, and acquiring area information;

step S203, adjusting a shielding plate of the shielding device between the X-ray emitting device and the body of the detected person by using the region information, so that the size of the variable light-transmitting opening of the shielding device is consistent with the visible light field region, and the size of the variable light-transmitting opening of the shielding device is consistent with the X-ray irradiation field region.

Specifically, step S201 is executed, after the subject stands behind the X-ray shielding device, the shielding plate is opened to a larger range, the X-ray emitting device emits a visible light beam, the visible light beam irradiates the subject to form a visible light field, and an operator of the X-ray examination device adjusts based on the visible light field, so that the visible light field is consistent with the portion of the subject to be examined, which is required by the subject. During the subsequent formal examination, the beam-forming device of the X-ray emission device can generate a beam of X-ray with the same size to irradiate the required examined part of the examined person, wherein the X-ray irradiation field is completely the same as the visible light field adjusted before. By the method, an operator can conveniently determine the size and the range of the X-ray irradiation field emitted by the beam splitter.

Step S202 is executed, and after the visible light field is determined, the imaging module or the photoelectric sensing module is used to acquire the region of the determined visible light field, so as to acquire region information.

In one embodiment, the movable photoelectric sensing module is used for detecting the light intensity change of different areas, so that the visible light field area can be determined. At least one or two photoelectric sensing modules are arranged in each moving direction of the shielding plate.

In another embodiment, a light reflecting area is arranged at the edge position of the shielding plate close to the light transmitting opening, an imaging module is arranged at one side of the shielding device close to the X-ray emitting device, and the visible light field area can be determined by moving the shielding plate and acquiring the reflected light display of the light reflecting area by the imaging module.

In this embodiment, the position corresponding to the first bright edge that appears, which is obtained by the imaging module, is used as the side line of the visible light field region of the beam splitter. In another embodiment, the position information corresponding to the power device or the position information corresponding to the shielding plate at the time when the bright edge appears may be used as the area information of the visible light field area.

In another embodiment, a movable reflector or a movable shielding plate itself may also be used, and the visible light field region may be determined when the imaging module acquires that the region of the reflector or the shielding plate itself has strong reflection.

Step S203 is executed, after the region information is acquired, the shielding plate of the shielding device between the X-ray emitting device and the body of the person to be detected is adjusted by using the region information, so that the size of the variable light-transmitting opening of the shielding device is consistent with the visible light field region, and the size of the variable light-transmitting opening of the shielding device is consistent with the X-ray irradiation field region.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.

Claims

1. An X-ray shielding method based on a light field of a beam splitter is characterized by comprising the following steps:

2. The X-ray shielding method according to claim 1, wherein the determining the visible light field area by using the photosensitive module specifically comprises:

3. The X-ray shielding method according to claim 2, wherein at least two photoelectric sensors are provided at each of the shielding plates near the edge of the variable light-transmitting opening, and the at least two photoelectric sensors are parallel to the edge of the adjacent shielding plate, and when all the photoelectric sensors detect a change in light intensity, the visible light field region is determined.

4. The X-ray shielding method according to claim 2, wherein at least two photosensors are provided at a position of each shielding plate near an edge of the variable light-transmitting opening, and the at least two photosensors are parallel to an edge of an adjacent shielding plate, and when at least one photosensor detects a change in light intensity, the visible light field region is determined.

5. The X-ray shielding method according to claim 2, wherein at least one photosensor is provided at a position of each of the shielding plates near the edge of the variable light-transmitting opening, and when the at least one photosensor detects a change in light intensity, the visible light field region is determined.

6. The X-ray shielding method according to claim 2, wherein at least two photosensors are disposed at a position of each shielding plate near an edge of the variable light-transmitting opening, and the at least two photosensors are perpendicular to an edge of an adjacent shielding plate, the perpendicular two photosensors constitute a differential photosensor module, and when the differential photosensor module detects that the light intensity is different, the visible light field region can be determined.

7. The X-ray shielding method according to claim 1, wherein the determining the visible light field area by using the photosensitive module specifically comprises:

8. An X-ray shielding apparatus based on a field of light of a beam splitter, comprising: the X-ray shielding device comprises a shielding plate supporting structure, a movable shielding plate, power equipment for driving the shielding plate and a shielding plate motion controller, wherein the shielding plate is movably arranged on the shielding plate supporting structure and is driven to move by the power equipment;

9. The X-ray shielding device according to claim 8, wherein the light sensing module is a photo sensor, at least two photo sensors are disposed at the edge of each shielding plate near the variable light-transmitting opening, and the at least two photo sensors are parallel to the edge of the adjacent shielding plate, and when all the photo sensors detect the change of the light intensity, or when at least one photo sensor detects the change of the light intensity, the visible light field region can be determined.

10. The X-ray shielding apparatus according to claim 8, wherein the light sensing modules are photosensors, at least two photosensors are disposed at a position of each shielding plate near an edge of the variable light-transmitting opening, and the at least two photosensors are perpendicular to an edge of an adjacent shielding plate, the perpendicular two photosensors constitute a differential photosensor module, and when the differential photosensor module detects a difference in light intensity, the visible light field region can be determined.

11. The X-ray shielding apparatus according to claim 8, wherein the light sensing modules are photosensors, and at least one photosensor is disposed at a position of each shielding plate near an edge of the variable light-transmitting opening, and when the at least one photosensor detects a change in light intensity, the visible light field region is determined.

12. The X-ray shielding apparatus of claim 8, wherein the movable shielding plate is provided with a light-reflecting region near the edge of the light-transmitting opening, the light-reflecting region is a light-sensing module, and an imaging module is provided on the side of the shielding apparatus near the X-ray emitting device, and by moving the shielding plate, the visible light field region can be determined when the imaging module obtains that the light-reflecting region has a light-reflecting display.

13. An X-ray examination apparatus based on a field of light from a beam splitter, comprising: the X-ray shielding device, the X-ray emitting device and the X-ray detecting device as claimed in any one of claims 8 to 12, wherein the X-ray shielding device is located between the X-ray emitting device and the X-ray detecting device, and the region between the X-ray shielding device and the X-ray detecting device is used for accommodating a subject.