CN112754510A

CN112754510A - PET-CT scanning system and method

Info

Publication number: CN112754510A
Application number: CN202110029357.2A
Authority: CN
Inventors: 黄振强; 金佳超; 吴杰; 李雷
Original assignee: FMI Technologies Inc
Current assignee: FMI Technologies Inc
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-05-07

Abstract

The invention discloses a PET-CT scanning system and a method, wherein the PET-CT scanning system comprises a base, an annular scanning frame movably arranged on the base, and a bracket fixedly arranged on the base, wherein a scanned piece is arranged on the bracket; the annular scanning frame is provided with a CT scanning assembly and a PET scanning assembly, and the CT scanning assembly and the PET scanning assembly rotate in the circumferential direction to change the scanning direction; the annular scanning frame moves axially relative to the base, so that the scanned piece on the bracket is positioned in the scanning range of the CT scanning assembly/PET scanning assembly or not positioned in the scanning range of the CT scanning assembly/PET scanning assembly. The annular scanning frame is integrated with the CT scanning assembly and the PET scanning assembly at the same time, so that the cost is lower compared with the two scanning frames in the prior art; and only possess annular scanning frame, the structure is little, conveniently shifts to other spaces such as ward, operating room and carries out scanning work.

Description

PET-CT scanning system and method

Technical Field

The invention relates to the technical field of PET-CT, in particular to a PET-CT scanning system and a method.

Background

The existing PET/CT equipment is mainly used for whole body diagnosis, the PET/CT complete machine mainly comprises a rack and a diagnosis bed, the rack consists of a CT rack and a PET rack, and the CT rack and the PET rack are respectively used for CT scanning and PET scanning, but the volume is larger, and the equipment is expensive; the energy storage module is not arranged, and the work can be carried out only by external power supply; the medical bed can not be moved, has no self-shielding, can be scanned only by a diagnosis bed matched with the medical bed, and can not enter places such as an operating room or a ward for scanning.

Disclosure of Invention

In order to overcome the technical defects, the invention aims to provide a movable PET-CT scanning system and a movable PET-CT scanning method for local parts.

The invention discloses a PET-CT scanning system, which comprises a base, an annular scanning frame movably arranged on the base, and a bracket fixedly arranged on the base, wherein a scanned piece is arranged on the bracket; the annular scanning frame is provided with a CT scanning assembly and a PET scanning assembly, and the CT scanning assembly and the PET scanning assembly rotate in the circumferential direction to change the scanning direction; the annular scanning frame moves axially relative to the base, so that the scanned piece on the bracket is positioned in the scanning range of the CT scanning assembly/PET scanning assembly or not positioned in the scanning range of the CT scanning assembly/PET scanning assembly.

Preferably, the annular scanning frame comprises a stator and an annular rotor, the stator is mechanically connected with the rotor and is electrically connected with the rotor through a slip ring, and the rotor circumferentially rotates relative to the stator; the CT scanning assembly and the PET scanning assembly are arranged on the rotor; the stator is movably arranged on the base and moves axially relative to the base.

Preferably, the stator is also annular, and the rotor is arranged in an inner ring of the stator; the upper surface of base is equipped with along stator axial's slide rail, the bottom surface of stator is equipped with the slider, the slider is in the slide rail internal motion makes the stator for base axial motion.

Preferably, the bottom plate is rectangular, the number of the slide rails is two, the two slide rails are respectively arranged on two opposite first sides and two opposite second sides of the bottom plate, and the length of the slide rail is consistent with the length of the first sides and the second sides; the bottom surface of the stator is provided with two sliding blocks with the same length as the sliding rail; the bottom plate further comprises a third side edge and a fourth side edge which are arranged oppositely, one end of the bracket is arranged on the midpoint of the third side edge/the fourth side edge, and the other end of the bracket is arranged in the circle center of the inner ring of the rotor.

Preferably, the bracket comprises a support frame and a supporting plate, wherein the support frame comprises a first support section and a second support section which are connected; the first supporting section is fixedly arranged on the bottom plate, the supporting plate is arranged on the second supporting section, the angle between the first supporting section and the second supporting section is alpha, and alpha is more than or equal to 90 degrees and less than 180 degrees, so that the supporting plate extends into the inner ring of the stator.

Preferably, the stator is further provided with a control assembly, and the control assembly is electrically connected with the CT scanning assembly and the PET scanning assembly; the CT scanning assembly comprises a high-voltage generator, a CT bulb tube, a CT detector and a CT data acquisition module, wherein the high-voltage generator, the CT bulb tube, the CT detector and the CT data acquisition module are distributed along the circumferential direction of the stator, and the CT bulb tube and the CT detector are arranged oppositely; the PET scanning assembly comprises a PET detector and a PET data acquisition module, the PET detector and the PET data acquisition module are distributed along the circumferential direction of the stator, and the PET detector is arranged between the CT bulb tube and the CT detector.

Preferably, the PET detector includes a first detection module and a second detection module, the first detection module and the second detection module are disposed opposite to each other, and are respectively disposed between the CT bulb and the CT detector, and respectively capture half of the ray information of a complete scanning angle.

Preferably, an electric storage power supply is arranged on the first side and/or the second side, and the electric storage power supply is electrically connected with the annular scanning frame; the power supply of the annular scanning frame is realized by connecting the electric power storage power supply with an external power supply, or the power supply of the annular scanning frame is supplied by the electric power storage power supply.

Preferably, the bottom surface of the base is provided with a roller, and the roller is provided with a locking mechanism, so that the roller is locked and cannot roll.

The invention also discloses a PET-CT scanning method, which is applied to the PET-CT scanning system, wherein the annular scanning frame moves axially relative to the base, so that a scanned piece on the bracket is placed in the scanning range of the CT scanning assembly/the PET scanning assembly to carry out the CT scanning process/the PET scanning process.

After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:

1. the stator structure has a self-shielding function, so that the stator structure is convenient to transfer to other spaces such as a ward, an operating room and the like for scanning;

2. the scanning bed in the prior art is replaced by the bracket to scan local parts, so that the scanning can be specially performed aiming at brain compensation, and the pertinence is strong;

3. the CT scanning assembly and the PET scanning assembly are simultaneously integrated on one annular scanning frame, and compared with two scanning frames in the prior art, the cost is lower;

4. through the electric power storage power supply with the gyro wheel makes the transfer of equipment use more convenient.

Drawings

FIG. 1 is a front view of an inner rotor of a PET-CT scanning system provided by the present invention;

FIG. 2 is a perspective view of an inner rotor of a PET-CT scanning system provided by the present invention;

FIG. 3 is a front view of an external stator of a PET-CT scanning system in accordance with the present invention;

FIG. 4 is a perspective view of an external stator of a PET-CT scanning system provided by the present invention;

FIG. 5 is a schematic structural diagram of various components of a rotor of a PET-CT scanning system according to the present invention;

FIG. 6 is a schematic view of a PET scanning assembly of the PET-CT scanning system of the present invention in a first position;

FIG. 7 is a schematic view of a PET scanning assembly of the PET-CT scanning system of the present invention in a second position;

FIG. 8 is a schematic view of a PET scanning assembly of the PET-CT scanning system of the present invention in a third position;

FIG. 9 is a schematic view of a PET scanning assembly of the PET-CT scanning system of the present invention in a fourth position;

FIG. 10 is a schematic structural diagram of a carrier of a PET-CT scanning system provided by the invention when the carrier is arranged in an inner ring space of a ring-shaped scanning frame;

fig. 11 is a schematic structural diagram of a carrier of a PET-CT scanning system provided by the present invention when the carrier is disposed outside the inner ring space of the ring-shaped gantry.

Reference numerals: 1-stator, 2-rotor, 201-CT bulb tube, 202-CT data acquisition module, 203-first detection module, 204-control component, 205-CT detector, 206-PET data acquisition module, 207-second detection module, 208-high voltage generator, 3-base, 4-roller, 5-bracket, 6-slide rail and 7-storage power supply.

Detailed Description

The advantages of the invention are further illustrated in the following description of specific embodiments in conjunction with the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.

Referring to the attached drawings 1-4, the invention discloses a PET-CT scanning system, which comprises a base 3, an annular scanning frame movably arranged on the base 3, and a bracket 5 fixedly arranged on the base 3, wherein a scanned piece is arranged on the bracket 5; be equipped with CT scanning subassembly and PET scanning subassembly on the annular scanning frame, CT scanning subassembly and PET scanning subassembly circumference rotary motion on base 3 to the scanning in each scanning direction is realized.

Referring to fig. 10-11, the ring-shaped gantry moves axially relative to the base 3, and when the ring-shaped gantry moves to make the bracket 5 located in the inner space of the ring-shaped gantry, the scanned object on the bracket 5 is placed in the scanning range of the CT scanning assembly/PET scanning assembly, so as to scan the scanned object; when the annular scanning frame moves to enable the bracket 5 to be positioned outside the inner annular space of the annular scanning frame, the scanned piece on the bracket 5 is not positioned outside the scanning range of the CT scanning assembly/PET scanning assembly, the scanning work cannot be carried out at the moment, and the scanned piece on the bracket 5 is scanned or stopped by the reciprocating axial movement of the annular scanning piece.

The invention saves the diagnosis bed of the traditional scanning system, saves a large amount of space, reduces the volume of equipment, realizes the multi-region movement of the scanning system, and can provide timely scanning work for regions except scanning shielding rooms of operating rooms, sickrooms and the like.

The invention is mainly applied to head scanning, and in the actual scanning process, the bracket 5 at the initial position is positioned outside the inner annular surface space of the annular scanning frame, so that the patient can smoothly place the head on the bracket 5 and keep the head still. The scanning process begins, and annular scanning frame axial displacement for bracket 5 is located within the interior anchor ring space of annular scanning frame, and patient's head is located the scanning region of annular scanning frame this moment, and CT scanning subassembly/PET scanning subassembly on the annular scanning frame carry out the rotation in a circumferential direction, with the realization to the CT scanning work or the PET scanning work of each position of patient's head. After the scanning process, the annular scanning frame axially moves towards the direction opposite to the initial moving direction, so that the bracket 5 is placed outside the inner annular surface space of the annular scanning frame again, and the head of the patient can be smoothly removed from the bracket 5, thereby completing the scanning work.

It should be noted that the present invention is preferably applied to the partial scanning of the head, but the present invention is also applicable to the partial scanning of other parts, and is not limited herein. When applied to partial scanning of other parts, a corresponding fixing component can be arranged on the bracket 5 to fix the scanned part and prevent the scanned part from moving during scanning to influence the scanning result.

Different scanning positions can be dealt with, different fixing components can be arranged, detachable brackets 5 with different shapes and sizes can be arranged, a plurality of different scanning positions can be dealt with, and when the local positions are scanned, the corresponding brackets 5 can be replaced. Or a plurality of fixing components are arranged on the bracket 5 at the same time, and when different scanning parts are scanned, the corresponding fixing components are used for fixing.

Preferably, the annular scanning frame comprises a stator 1 and an annular rotor 2, and the stator 1 is mechanically connected with the rotor 2 and electrically connected through a slip ring to transmit various communication signals. The CT scanning assembly and the PET scanning assembly are arranged in the same rotor 2, and the rotor 2 rotates in the circumferential direction relative to the stator 1, so that the CT scanning assembly and the PET scanning assembly rotate in the circumferential direction to change the scanning angle, and scanning in all directions is performed. Stator 1 activity sets up on base 3, and for base 3 axial motion, 1 axial motion of stator drives CT scanning subassembly and PET scanning subassembly axial motion to it is outside CT scanning subassembly/PET scanning subassembly's scanning range or scanning range to make on the bracket 5 the scanned piece place.

Preferably, the stator 1 is also annular, and the rotor 2 is provided in an inner ring of the stator 1 via a bearing and rotates in a circumferential direction on an inner annular surface of the stator 1. The upper surface of base 3 is equipped with along the axial slide rail 6 of stator 1, and the bottom surface of stator 1 is equipped with the slider, and the slider moves in slide rail 6 for stator 1 is relative to 3 axial motion of base.

In other embodiments, the stator 1 may not be annular, and only supports the rotor 2, but the bottom surface of the stator 1 also needs to be provided with a sliding block which is matched with the sliding rail 6 on the base 3 to realize the axial movement of the stator 1 and the rotor 2.

Preferably, the bottom plate is rectangular, the slide rail 6 includes two opposite first and second sides respectively disposed on the bottom plate, the first and second sides are in the same axial direction as the stator 1, and the length of the slide rail 6 is the same as the length of the first and second sides, which is more accurately understood as a slide bar. Two sliding blocks with the same length as the sliding rail 6 are respectively arranged on two sides of the bottom surface of the stator 1, and the sliding blocks move in the sliding rail 6, so that the stator 1 moves on the bottom plate along the axial direction. Through setting up two slide rails 6 for the axial motion of stator 1 is more stable.

In the embodiment, the width of the bottom plate is consistent with that of the stator 1, so that the integrity and the fluency of the system are good. In other embodiments, the width of the base plate may be greater than the width of the stator 1, the center of gravity of the wider base plate is more stable, and the stator 1 and the rotor 2 on the stator 1 can be more stably supported, and the size of the sliding block may be smaller than that of the sliding rail 6, so as to save materials.

The bottom plate also comprises a third side edge and a fourth side edge which are oppositely arranged, one end of the bracket 5 is arranged on the midpoint of the third side edge/the fourth side edge, and the other end of the bracket is arranged at the center of the inner ring of the rotor 2, so that a scanned part on the bracket 5 is positioned at the center of the scanning range of the CT scanning assembly and the PET scanning assembly.

Preferably, the bracket 5 comprises a support frame and a supporting plate, wherein the support frame comprises a first support section and a second support section which are connected; first support section sets firmly on the bottom plate, and the layer board is located on the second support section, and the angle between first support section and the second support section is alpha, and alpha <180 is more than or equal to 90, through setting up to the bending form between first support section and the second support section for the layer board can stretch into stator 1's inner ring, thereby makes on the layer board by the scanning piece can be arranged in CT scanning subassembly and PET scanning subassembly's scanning range.

If no bending angle is provided between the first support segment and the second support segment, i.e., α is 180 °, the pallet cannot enter the scanning range of the CT scanner unit and the PET scanner unit regardless of how the stator 1 moves axially. When the bending angle between the first supporting section and the second supporting section is smaller than 90 degrees, the height of the head of the patient is smaller than that of the body during scanning, and discomfort can be brought. When the bending angle between the first support section and the second support section is equal to 90 °, the patient will also experience discomfort during scanning, so the optimal bending angle should be 90 ° < α <180 °.

Referring to fig. 5, preferably, the stator 1 is further provided with a control module, and the control module is electrically connected with the CT scanning module and the PET scanning module to control the scanning process of the CT scanning module and the PET scanning module. Specifically, the CT scanning assembly includes a high voltage generator 208, a CT bulb 201, a CT detector 205, a collimator, a CT data acquisition module 202, and the like, which are distributed along the circumferential direction of the stator 1, the CT bulb 201 and the CT detector 205 are arranged oppositely, and at this time, two opposite accommodating spaces exist between the CT bulb 201 and the CT detector 205 on the rotor 2; the PET scanning assembly comprises a PET detector and a PET data acquisition module 206 which are distributed along the circumferential direction of the stator 1, the PET detector is arranged between the CT bulb tube 201 and the CT detector 205, namely in the accommodating space, the purpose of simultaneously integrating the CT scanning assembly and the PET scanning assembly on the same annular scanning frame is achieved, the space is saved to the maximum extent, the cost is reduced, and the movement is convenient.

Referring to fig. 6-9, preferably, the PET detector includes a first detection module 201 and a second detection module 207, the first detection module 201 and the second detection module 207 are disposed opposite to each other, and respectively disposed in two receiving spaces between the CT bulb 201 and the CT detector 205, and respectively cover 50% of an inner circular ring surface of the annular scanning frame, and are respectively configured to capture ray information of a half of a complete scanning angle. When PET scanning is carried out, scanning of the first position is carried out, after the scanning of the first position is finished, the rotor 2 rotates 90 degrees, then scanning of the second position is carried out, and then scanning of the third position and scanning of the fourth position are carried out, so that the scanning work of the whole circular ring is realized.

Preferably, the first side and/or the second side is provided with an electric power storage source 7, and the electric power storage source 7 is electrically connected with the annular scanning frame. The power supply to the annular scanning frame is realized by connecting the electric power storage power supply 7 with an external power supply, namely, the circular scanning frame is electrified by connecting the external power supply under the condition that the ward, the operating room and the like are provided with the external power supply, or the circular scanning frame is supplied with power by storing the power supply through the electric power storage power supply 7, namely, the circular scanning frame is supplied with power by a standby power supply under the condition that the external power supply is not provided.

Preferably, four corners of the bottom surface of the base 3 are respectively provided with a roller 4, and the movement of the PET-CT scanning system is realized through the rollers 4. The PET-CT scanning system needs to be kept stable and still in the scanning process or the storage process, so a locking mechanism is also arranged on the roller 4, and the roller 4 is locked and cannot roll.

The invention also discloses a PET-CT scanning method, which is applied to the PET-CT scanning system, and the annular scanning frame moves axially relative to the base 3, so that a scanned part on the bracket 5 is placed in the scanning range of the CT scanning assembly/the PET scanning assembly to carry out the CT scanning process/the PET scanning process.

It should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.

Claims

1. A PET-CT scanning system is characterized by comprising a base, an annular scanning frame movably arranged on the base, and a bracket fixedly arranged on the base, wherein a scanned piece is arranged on the bracket; the annular scanning frame is provided with a CT scanning assembly and a PET scanning assembly, and the CT scanning assembly and the PET scanning assembly rotate in the circumferential direction to change the scanning direction;

the annular scanning frame moves axially relative to the base, so that the scanned piece on the bracket is positioned in the scanning range of the CT scanning assembly/PET scanning assembly or not positioned in the scanning range of the CT scanning assembly/PET scanning assembly.

2. The PET-CT scanning system of claim 1, wherein the annular gantry comprises a stator and an annular rotor, the stator being mechanically connected to the rotor and electrically connected by a slip ring, the rotor moving circumferentially in rotation relative to the stator; the CT scanning assembly and the PET scanning assembly are arranged on the rotor;

the stator is movably arranged on the base and moves axially relative to the base.

3. The PET-CT scanning system of claim 2, wherein the stator is also annular and the rotor is disposed in an inner ring of the stator;

the upper surface of base is equipped with along stator axial's slide rail, the bottom surface of stator is equipped with the slider, the slider is in the slide rail internal motion makes the stator for base axial motion.

4. The PET-CT scanning system of claim 3, wherein the bottom plate is rectangular, the slide rails comprise two slide rails respectively disposed on two opposite first and second sides of the bottom plate, and the length of the slide rails is consistent with the length of the first and second sides;

the bottom surface of the stator is provided with two sliding blocks with the same length as the sliding rail;

the bottom plate further comprises a third side edge and a fourth side edge which are arranged oppositely, one end of the bracket is arranged on the midpoint of the third side edge/the fourth side edge, and the other end of the bracket is arranged in the circle center of the inner ring of the rotor.

5. The PET-CT scanning system of claim 4, wherein the carriage comprises a support frame and a pallet, the support frame comprising first and second connected support sections;

the first supporting section is fixedly arranged on the bottom plate, the supporting plate is arranged on the second supporting section, the angle between the first supporting section and the second supporting section is alpha, and alpha is more than or equal to 90 degrees and less than 180 degrees, so that the supporting plate extends into the inner ring of the stator.

6. The PET-CT scanning system of claim 2, wherein a control assembly is further disposed on the stator, and the control assembly is electrically connected to the CT scanning assembly and the PET scanning assembly;

the CT scanning assembly comprises a high-voltage generator, a CT bulb tube, a CT detector and a CT data acquisition module, wherein the high-voltage generator, the CT bulb tube, the CT detector and the CT data acquisition module are distributed along the circumferential direction of the stator, and the CT bulb tube and the CT detector are arranged oppositely;

the PET scanning assembly comprises a PET detector and a PET data acquisition module, the PET detector and the PET data acquisition module are distributed along the circumferential direction of the stator, and the PET detector is arranged between the CT bulb tube and the CT detector.

7. The PET-CT scanning system of claim 6, wherein the PET detector comprises a first detection module and a second detection module, the first detection module and the second detection module are disposed opposite to each other and respectively disposed between the CT bulb and the CT detector, and respectively capture ray information of half of a complete scanning angle.

8. The PET-CT scanning system of claim 4, wherein an electrical storage power supply is arranged on the first side and/or the second side, and the electrical storage power supply is electrically connected with the annular scanning frame;

the power supply of the annular scanning frame is realized by connecting the electric power storage power supply with an external power supply, or the power supply of the annular scanning frame is supplied by the electric power storage power supply.

9. The PET-CT scanning system of claim 1, wherein the bottom surface of the base is provided with a roller, the roller being provided with a locking mechanism such that the roller is locked from rolling.

10. A PET-CT scanning method applied to the PET-CT scanning system of any one of the claims 1 to 9, wherein the ring-shaped gantry moves axially relative to the base so that the scanned object on the bracket is placed in the scanning range of the CT scanning assembly/PET scanning assembly to perform the CT scanning process/PET scanning process.