CN111631744A - Method, device and system for CT scanning positioning - Google Patents
Method, device and system for CT scanning positioning Download PDFInfo
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Abstract
The application discloses a method, a device and a system for CT scanning positioning. The method comprises the steps of acquiring a body appearance image of a patient through a camera, and displaying the body appearance image on a display terminal which is visible for the patient and a doctor in real time; searching a standard graph matched with the physiognomic image in a scanning attitude standard graph library; comparing the physical image with the standard graph; and generating correction prompt information according to the comparison result and outputting the correction prompt information through a display terminal, so that the patient is always kept consistent with the standard graphic standard in the whole examination. The method solves the problem that the patient is positioned before scanning by an experienced doctor or a technician in the existing CT scanning process.
Description
Technical Field
The present invention relates to the field of CT scanning technologies, and in particular, to a method, an apparatus, and a system for CT scanning positioning.
Background
Before the traditional CT scanning of a patient, the scanning needs to be positioned, and generally, the scanning positioning comprises the following steps: (1) the method comprises the following steps of (1) assisting a patient to lie on an examination table, (2) turning on a laser positioning lamp, (3) positioning the patient at the ISO center position of equipment (or in the middle of the aperture of a scanning frame), (4) guiding the patient to finish the standard posture to be examined, (5) positioning and scanning the starting position, (6) turning off the laser positioning lamp (7) and confirming the position. Since CT scanning generates radiation and is harmful to health, CT scanning consistently seeks to achieve image quality that meets diagnostic requirements with as little radiation dose as possible. The radiation dose can be effectively reduced by accurately controlling the scanning starting range, enabling the patient to be positioned in the scanning center and avoiding repeated scanning. Technical solutions on how to solve the relationship between the patient and the CT scanning center are also proposed in the prior art. The application document CN 102805636B adopts a double-camera patient positioning system, and the system respectively acquires a positive position image and/or a lateral position image of a patient through two A \ B wide-angle cameras and reconstructs the images into a plane view suitable for human eyes. The method has the disadvantages that real-time feedback cannot be made according to the posture or position change of the patient, namely, when the posture of the patient changes, the deviation between the acquired image and the actual human body cannot be real-time. The second disadvantage is that the patient still needs to be scanned and normally positioned by an experienced technician or doctor, i.e. the dependence on the technician or doctor is strong. The third disadvantage is that the double cameras invest more hardware, which greatly increases the difficulty in terms of cost and site requirements. In the application document CN 104224212B, a 3D camera is used to acquire 3D data of a patient and the data is converted into a spatial coordinate system of a CT system by correction matching. Although the spatial matching conversion relationship between the patient positioning system and the CT scanning system is specified, the patient can be positioned at an ISO position, but the standard positioning specification of the examination is not given, so that repeated scanning can be caused because the posture of the patient does not meet the specification, and the scanning radiation dose is increased. Nor does its camera system give a solution to this. Therefore, the solution does not effectively deal with the posture of the patient on the examination table. In summary, in the existing CT positioning scanning method, the deviation between the acquired image and the actual human body is not real-time, and the posture of the patient on the examination table cannot be effectively solved, so that the relationship between the patient and the CT scanning center cannot be effectively ensured in the scanning process.
Disclosure of Invention
The present application mainly aims to provide a method, an apparatus, and a system for CT scanning positioning, so as to solve the problem that the existing CT scanning process relies on an experienced doctor or technician to perform positioning before scanning on a patient, and the dependence on the experienced doctor or technician is strong.
To achieve the above object, according to a first aspect of the present application, a method of CT scan localization is provided.
The method for positioning the CT scanning comprises the following steps:
acquiring a body appearance image of a patient through a camera, and displaying the body appearance image on a display terminal visible to a user in real time;
searching a standard graph matched with the physiognomic image in a scanning attitude standard graph library;
comparing the physical image with the standard graph;
and generating correction prompt information according to the comparison result and outputting the correction prompt information through a display terminal to enable the posture of the patient to be consistent with the standard graph.
Optionally, before acquiring a physical image of the patient through the camera, the method further includes:
establishing a scanning attitude standard graphic library according to CT inspection technical expert consensus, medical image diagnosis and treatment technical standard specifications and/or guidelines, wherein the scanning attitude standard graphic library comprises profile standard graphics and scanning baselines corresponding to scanning attitudes of different parts;
and acquiring human body three-dimensional information and human body part information through the camera.
Optionally, the standard graph is a two-dimensional contour standard graph, and comparing the physical image with the standard graph includes:
and carrying out alignment matching on the body surface feature information in the body appearance image and the two-dimensional contour standard graph.
Optionally, generating a correction prompt message according to the comparison result and outputting the correction prompt message through the display terminal includes:
judging whether the comparison result is that the position deviation exists or not;
and if the position deviation exists, generating correction prompt information, and outputting the correction prompt information to the display terminal in a color marking mode and/or a character display mode and/or a voice playing mode.
Optionally, the method further includes:
and if the comparison result shows that no position deviation exists, determining a scanning datum line, a scanning range datum line and a positioning datum line.
In order to achieve the above object, according to a second aspect of the present application, there is provided an apparatus for positioning in CT scan.
The device for positioning in CT scanning comprises:
the acquiring unit is used for acquiring a patient body appearance image through the camera and displaying the body appearance image on a display terminal which is visible to a user in real time;
the searching unit is used for searching a standard graph matched with the physiognomic image in a scanning posture standard graph library;
the comparison unit is used for comparing the physical image with the standard graph;
and the generating unit is used for generating correction prompt information according to the comparison result and outputting the correction prompt information through the display terminal so that the posture of the patient is consistent with the standard graph.
Optionally, the apparatus further comprises:
the standard image library establishing unit is used for establishing a scanning attitude standard image library according to the common knowledge of technical experts of CT examination, the medical image diagnosis and treatment technical standard specifications and/or guidelines, wherein the scanning attitude standard image library comprises profile standard images and scanning baselines corresponding to scanning attitudes of different parts;
the acquisition unit is also used for acquiring human body three-dimensional information and human body part information through the camera.
Optionally, the standard graph is a two-dimensional profile standard graph, and the comparison unit is configured to:
and carrying out alignment matching on the body surface feature information in the body appearance image and the two-dimensional contour standard graph.
Optionally, the generating unit includes:
the judging module is used for judging whether the comparison result is that the position deviation exists or not;
and the generating module is used for generating correction prompt information if the position deviation exists, and outputting the correction prompt information to the display terminal in a color marking mode and/or a character display mode and/or a voice playing mode.
Optionally, the apparatus further comprises:
and the determining unit is used for determining the scanning datum line, the scanning range datum and the positioning datum line if the comparison result shows that no position deviation exists.
In order to achieve the above object, according to a third aspect of the present application, there is provided a system for positioning CT scanning, including an examining table, a CT scanning frame, the system further includes a camera, a display terminal visible to a user, and a server:
the camera is used for acquiring a patient body appearance image, human body three-dimensional information and human body part information;
the server is configured to execute the method for CT scanning positioning according to any one of the first aspect;
the display terminal visible to the user is used for displaying the body appearance image and a standard graph matched with the body appearance image; and outputting correction prompt information.
To achieve the above object, according to a fourth aspect of the present application, there is provided a non-transitory computer-readable storage medium, characterized in that the non-transitory computer-readable storage medium stores computer instructions for causing the computer to execute the method for CT scan localization according to any one of the above first aspects.
In the method, the device and the system for CT scanning positioning, a patient body appearance image is acquired through a camera, and the body appearance image is displayed on a display terminal visible to a user in real time; searching a standard graph matched with the physiognomic image in a scanning attitude standard graph library; comparing the physical image with the standard graph; and generating correction prompt information according to the comparison result and outputting the correction prompt information through a display terminal to enable the patient to perform real-time posture adjustment. Therefore, the CT scanning and positioning mode can compare the physical image of the patient with the corresponding standard image in the standard posture image library in real time, timely output the correction prompt information to the display terminal visible to the user, and enable the patient to timely and accurately adjust the posture so as to meet the standard. The CT scanning positioning mode does not need to depend on an experienced doctor or a technician to perform pre-scanning positioning on the patient, and the dependence on the experienced doctor or the technician is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a flow chart of a method of CT scan localization according to an embodiment provided herein;
FIG. 2 is a diagram illustrating the position relationship of components involved in a method of CT scan localization according to an embodiment provided herein;
FIG. 3 is a flow chart of a method of CT scan localization according to another embodiment provided herein;
FIG. 4 is a schematic diagram of a scanning datum line, a positioning datum line and a scanning range according to an embodiment of the present application;
FIG. 5 is a block diagram of an apparatus for CT scan localization according to an embodiment provided herein;
fig. 6 is a block diagram of an apparatus for CT scan positioning according to another embodiment provided in the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
According to an embodiment of the present application, there is provided a method for positioning in CT scan, as shown in fig. 1, the method includes the following steps S101 to S104:
s101, acquiring a patient body appearance image through a camera, and displaying the body appearance image on a display terminal visible to a user in real time.
The patient is positioned on the examination table and the camera is positioned above the examination table, as shown in fig. 2. When CT scanning is performed, a body appearance image of a patient is captured by the camera and is displayed on a display terminal visible to a user in real time, and the display terminal visible to the user is also positioned above the examination table, as shown in figure 2. The patient and the doctor can see the physical image of the patient through the display terminal. The body appearance image comprises body appearance information of the patient, and the body appearance information comprises body surface information of the characteristics of eyes, a nose, an external auditory canal and a mouth. In addition, due to the difference of body types of different patients, in order to be conveniently compared with the standard graph in the standard graph library in the follow-up process, the camera also has an automatic focusing function and a self-adaptive zooming function so as to be suitable for matching the body appearance images of the patients with different body types and ages with the standard graph.
And S102, searching a standard graph matched with the physical image in the scanning posture standard graph library.
The scanning posture standard graphic library is a normal and/or lateral two-dimensional contour standard graphic library which is established based on CT examination technical expert consensus, medical image diagnosis and treatment technical standard specifications and/or guidelines and based on scanning positioning standard specifications (including the relation between a patient and a CT scanning center) of body parts such as a head, a chest, an abdomen and the like. The "searching for the standard graph matching the body appearance image in the scanning posture standard graph library" is to search for the standard graph matching the posture and the arrangement of the body appearance image acquired in the step S101 in the scanning posture standard graph library according to the acquired body appearance image acquired in the step S. It should be noted that, for CT scanning of different parts, the corresponding scanning parts, positions and postures are different, so that a standard graph matched with a physical image needs to be searched. And regarding the process of searching the standard graph, namely, performing similarity comparison on the body appearance image and the standard graph of the same scanning part in the standard library, and taking the standard graph with the highest similarity as the standard graph matched with the body appearance image. The standard graph is a two-dimensional contour graph, so that the physical image needs to be preprocessed before comparison to obtain a corresponding two-dimensional contour image, and then similarity comparison is carried out. The similarity comparison method can adopt any one of the existing graph similarity calculation modes. For example, similarity calculation based on euclidean distance, similarity calculation based on cosine distance, similarity calculation based on hamming distance, and the like.
In addition, after the standard image matched with the physical image is found, the standard image is synchronously displayed on a display terminal visible for a user.
S103, comparing the physical image with the standard graph.
The standard graph is a two-dimensional contour map taking human body surface characteristic information (such as eyes, nose, mouth and arms) as key identification points. When comparing, it is mainly to compare whether the positions of the key identification points are the same.
And S104, generating correction prompt information according to the comparison result and outputting the correction prompt information through a display terminal to enable the posture of the patient to be consistent with the standard graph.
The correction prompt information is generated according to a real-time comparison result, and how to correct the posture and position of the patient to enable the position of each key identification point of the physical image to be the same as that of each key identification point of the standard graph. The correction prompt information is output in real time through a display terminal visible to a user, and the output form is not limited to color and/or text and/or voice prompt. In the correction process, for each correction operation, the comparison is carried out with the standard graph again to generate the comparison result and the corresponding correction prompt information, and the correction operation is carried out for multiple times until the positions of the correction operation are the same as the positions of the key identification points.
From the above description, it can be seen that in the method for CT scanning positioning in the embodiment of the present application, a patient body image is acquired by a camera, and the body image is displayed on a display terminal visible to a user in real time; searching a standard graph matched with the physiognomic image in a scanning attitude standard graph library; comparing the physical image with the standard graph; and generating correction prompt information according to the comparison result and outputting the correction prompt information through a display terminal to enable the patient to perform real-time posture adjustment. Therefore, the CT scanning and positioning mode can compare the physical image of the patient with the corresponding standard graph in the standard posture graph library in real time, and output the correction prompt information through the display terminal visible to the user in time, so that the patient can adjust the posture and the positioning accurately in time to meet the standard.
Further, in a further refinement and supplement to the embodiment shown in fig. 1, the present embodiment provides another method for positioning CT scan, as shown in fig. 3.
S201, according to the technical expert consensus of CT examination, the medical image diagnosis and treatment technical standard specification and/or guidelines, a scanning posture standard graphic library is established, and the scanning posture standard graphic library comprises profile standard graphics and scanning baselines corresponding to different scanning postures.
Based on the technical expert consensus of CT examination, the medical image diagnosis and treatment technical standard specification and/or the guideline, the standard specification of scanning and positioning of the head, the chest, the abdomen and the like is used as the basis, and the standard graphic library of the two-dimensional outline of the normal position and/or the lateral position is established. The scanning attitude standard graph library comprises profile standard graphs and scanning baselines corresponding to scanning attitudes of different parts. The standard graphic library takes human body surface characteristic information as key identification points, such as eyes, a nose, a mouth, arms and the like, and also comprises a scanning datum line, a positioning datum line and a scanning range. For example, the craniocerebral scan reference line of the canthus line, the positioning reference line perpendicular to the canthus line and passing through the baseline of the external ear canal, the vertex of the cranium, as shown in fig. 4. The dotted lines 1 and 2 are positioning reference lines, the dotted line 3 is a scanning reference line, and the dotted line 4 is a scanning range reference.
S202, acquiring a patient body appearance image through a camera, and displaying the body appearance image on a display terminal visible to a user in real time.
The implementation of this step is the same as that of step S101 in fig. 1, and is not described here again.
In addition, before the camera acquires the body appearance image of the patient, the three-dimensional information and the body part information of the human body are acquired. The human body three-dimensional information comprises human body thickness, width and height; the human body part information comprises head, neck, shoulder, chest, abdomen, pelvic cavity and the like. The human body three-dimensional information is used for establishing a positioning datum line. The human body part information is used for screening the standard graph when the standard graph matched with the physical image is searched.
And S203, searching a standard graph matched with the physical image in the scanning posture standard graph library.
The implementation of this step is the same as that of step S102 in fig. 1, and is not described here again.
And S204, carrying out alignment matching on the body surface feature information in the body appearance image and the two-dimensional outline standard graph.
The standard graph library takes human body surface characteristic information as key identification points, wherein the key identification points are eyes, noses, mouths, arms and the like, and the body surface characteristic information of the body appearance image is also the key identification points of the body appearance image, namely the eyes, the noses, the mouths, the arms and the like. Therefore, when the body appearance image is compared with the standard graph, the key identification points of the body appearance image and the key identification points of the standard graph are aligned and matched, namely the same key identification points are respectively matched in position.
S205, judging whether the comparison result is that the position deviation exists.
And S206, if the position deviation exists, generating correction prompt information, and outputting the correction prompt information to the display terminal in a color marking mode and/or a character display mode and/or a voice playing mode.
If the key identification point of the body appearance image is not matched with the key identification point corresponding to the standard image and has position offset, generating a position offset result (direction, distance and the like), and generating corresponding correction prompt information according to the position offset result, wherein the correction prompt information at least comprises the position adjustment direction, distance and the like. Meanwhile, the correction prompt information is output in a color marking mode and/or a character display mode and/or a voice playing mode. The specific color marking mode and/or text display mode and/or voice playing mode are displayed or played through the movable terminal visible to the user. After the patient receives the correction prompt information, the posture and the position of the patient can be accurately adjusted in time according to the correction prompt information so as to conform to the standard graph. The calibration process may require multiple iterations of calibration until the standard pattern is met.
And S207, if the comparison result shows that no position deviation exists, determining a scanning datum line, a scanning range datum line and a positioning datum line.
And if the comparison result is that no position offset exists, the current corresponding physical image of the patient conforms to the standard graph. The scanning reference line is determined according to the determined human body surface characteristic information or the key identification points. A specific example is given for illustration, for example, for a craniocerebral CT scan examination, the scanning reference line is the craniocerebral angular line, which is established according to the external auditory canal and the eye, as shown by the dashed line 3 in fig. 4. And establishing a positioning datum line according to the three-dimensional information of the human body. And determining a positioning datum line by combining the determined human body surface characteristic information or the key identification point and the human body three-dimensional information. The positioning datum lines corresponding to the CT scans of different parts may be different. In this embodiment, a craniocerebral CT scan examination is taken as an example for explanation, and on the basis that a current corresponding body image of a patient conforms to a standard graph, a perpendicular line passing through a nose is established through a binocular connection line to serve as a positioning standard for a craniocerebral sagittal position, as shown by a dashed line 1 in fig. 4; further establish the standard of cranial coronal orientation through the external auditory canal and perpendicular to the canthus line (dotted line 3) as shown by dotted line 2 in fig. 4; from the cranial vertex, a scan start location (i.e., a scan range reference) is established, as shown by the dashed line 4 in fig. 4. And after the scanning reference line, the positioning reference line and the scanning range reference are determined, positioning before scanning is completed.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
There is also provided, according to an embodiment of the present application, an apparatus for performing CT scan positioning of the method of fig. 1, as shown in fig. 5, the apparatus including:
the acquiring unit 31 is used for acquiring a body appearance image of a patient through a camera and displaying the body appearance image on a display terminal visible to a user in real time;
a searching unit 32, configured to search a standard graph matched with the body appearance image in a scanning posture standard graph library;
a comparison unit 33, configured to compare the physical image with the standard graph;
and the generating unit 34 is used for generating correction prompt information according to the comparison result and outputting the correction prompt information through the display terminal so that the posture of the patient is consistent with the standard graph.
Specifically, the specific process of implementing the functions of each module in the apparatus in the embodiment of the present application may refer to the related description in the method embodiment, and is not described herein again.
From the above description, it can be seen that in the device for CT scanning positioning in the embodiment of the present application, a patient body image is acquired through a camera, and the body image is displayed on a display terminal visible to a user in real time; searching a standard graph matched with the physiognomic image in a scanning attitude standard graph library; comparing the physical image with the standard graph; and generating correction prompt information according to the comparison result and outputting the correction prompt information through a display terminal to enable the patient to perform real-time posture adjustment. Therefore, the CT scanning and positioning mode can compare the physical image of the patient with the corresponding standard image in the standard posture image library in real time, timely output the correction prompt information to the display terminal visible to the user, and enable the patient to timely and accurately adjust the posture so as to meet the standard.
Further, as shown in fig. 6, the apparatus further includes:
the standard image library establishing unit 35 is configured to establish a scanning posture standard image library according to the common knowledge of the technical experts of CT examination, the medical image diagnosis and treatment technical standard specifications and/or guidelines, where the scanning posture standard image library includes profile standard images and scanning baselines corresponding to different scanning postures of different parts;
the acquiring unit 31 is further configured to acquire three-dimensional information and part information of the human body through a camera.
Further, the standard graph is a two-dimensional profile standard graph, and the comparing unit 33 is configured to:
and carrying out alignment matching on the body surface feature information in the body appearance image and the two-dimensional contour standard graph.
Further, as shown in fig. 6, the generating unit 34 includes:
a determining module 341, configured to determine whether a position offset exists in the comparison result;
the generating module 342 is configured to generate the correction prompt information if the position offset exists, and output the correction prompt information to the display terminal in a color labeling manner and/or a text display manner and/or a voice playing manner.
Further, as shown in fig. 6, the apparatus further includes:
and the determining unit 36 is configured to determine the scanning reference line, the scanning range reference, and the positioning reference line if the comparison result indicates that there is no position deviation.
Specifically, the specific process of implementing the functions of each module in the apparatus in the embodiment of the present application may refer to the related description in the method embodiment, and is not described herein again.
According to the embodiment of the present application, there is also provided a CT scanning positioning system, including an examining table and a CT scanning frame, the system further includes a camera, a display terminal visible to a user, and a server:
the position relationship of the examination bed, the CT scanning frame, the camera and the display terminal visible to the user is shown in figure 2.
The camera is used for acquiring a patient body appearance image, human body three-dimensional information and human body part information;
the server is configured to execute the method for CT scanning positioning described in any one of fig. 1 and fig. 3;
the display terminal visible to the user is used for displaying the body appearance image and a standard graph matched with the body appearance image; and outputting correction prompt information.
Specifically, the specific process of implementing the functions of each module in the apparatus in the embodiment of the present application may refer to the related description in the method embodiment, and is not described herein again.
From the above description, it can be seen that in the system for CT scanning positioning in the embodiment of the present application, a patient body image is acquired by a camera, and the body image is displayed on a display terminal visible to a user in real time; searching a standard graph matched with the physiognomic image in a scanning attitude standard graph library; comparing the physical image with the standard graph; and generating correction prompt information according to the comparison result and outputting the correction prompt information through a display terminal to enable the patient to perform real-time posture adjustment. Therefore, the CT scanning and positioning mode can compare the physical image of the patient with the corresponding standard image in the standard posture image library in real time, timely output the correction prompt information to the display terminal visible to the user, and enable the patient to timely and accurately adjust the posture so as to meet the standard.
There is also provided, in accordance with an embodiment of the present application, a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of CT scan localization of any one of fig. 1 and 3.
It will be apparent to those skilled in the art that the modules or steps of the present application described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and they may alternatively be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present application is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method of CT scan localization, the method comprising:
acquiring a body appearance image of a patient through a camera, and displaying the body appearance image on a display terminal visible to a user in real time;
searching a standard graph matched with the physiognomic image in a scanning attitude standard graph library;
comparing the physical image with the standard graph;
and generating correction prompt information according to the comparison result and outputting the correction prompt information through a display terminal to enable the posture of the patient to be consistent with the standard graph.
2. The method of CT scan localization according to claim 1, wherein prior to acquiring a patient morphology image by a camera, the method further comprises:
establishing a scanning attitude standard graphic library according to CT inspection technical expert consensus, medical image diagnosis and treatment technical standard specifications and/or guidelines, wherein the scanning attitude standard graphic library comprises profile standard graphics and scanning baselines corresponding to scanning attitudes of different parts;
and acquiring human body three-dimensional information and human body part information through the camera.
3. The method of claim 2, wherein the standard graph is a two-dimensional contour standard graph, and the comparing the physical image with the standard graph comprises:
and carrying out alignment matching on the body surface feature information in the body appearance image and the two-dimensional contour standard graph.
4. The method of claim 1, wherein generating the correction prompt message according to the comparison result and outputting the correction prompt message through a display terminal comprises:
judging whether the comparison result is that the position deviation exists or not;
and if the position deviation exists, generating correction prompt information, and outputting the correction prompt information to the display terminal in a color marking mode and/or a character display mode and/or a voice playing mode.
5. The method of CT scan localization according to claim 4, further comprising:
and if the comparison result shows that no position deviation exists, determining a scanning datum line, a scanning range datum line and a positioning datum line.
6. An apparatus for positioning in a CT scan, the apparatus comprising:
the acquiring unit is used for acquiring a patient body appearance image through the camera and displaying the body appearance image on a display terminal which is visible to a user in real time;
the searching unit is used for searching a standard graph matched with the physiognomic image in a scanning posture standard graph library;
the comparison unit is used for comparing the physical image with the standard graph;
and the generating unit is used for generating correction prompt information according to the comparison result and outputting the correction prompt information through the display terminal so that the posture of the patient is consistent with the standard graph.
7. The apparatus for positioning in CT scan according to claim 6, further comprising:
the standard image library establishing unit is used for establishing a scanning attitude standard image library according to the common knowledge of technical experts of CT examination, the medical image diagnosis and treatment technical standard specifications and/or guidelines, wherein the scanning attitude standard image library comprises profile standard images and scanning baselines corresponding to scanning attitudes of different parts;
the acquisition unit is also used for acquiring human body three-dimensional information and human body part information through the camera.
8. The apparatus for CT scan positioning according to claim 7, wherein the standard graph is a two-dimensional profile standard graph, and the comparing unit is configured to:
and carrying out alignment matching on the body surface feature information in the body appearance image and the two-dimensional contour standard graph.
9. The utility model provides a system for CT scanning location, includes examining table, CT scan frame, its characterized in that, the system still includes camera, user's visible display terminal, server:
the camera is used for acquiring a patient body appearance image, human body three-dimensional information and human body part information;
the server is used for executing the CT scanning positioning method of any one of the above claims 1 to 5;
the display terminal visible to the user is used for displaying the body appearance image and a standard graph matched with the body appearance image; and outputting correction prompt information.
10. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of CT scan localization of any one of claims 1 to 5.
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