CN113288191A - Scanning bed correction method, device, medium and equipment based on positive sheet - Google Patents
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Abstract
The present disclosure relates to a scanning bed correction method, apparatus, medium and device based on positive slice, the method comprising: determining display range information corresponding to the positive bit slice data according to the acquired positive bit slice data, wherein the display range information comprises a starting position and an ending position; determining the thickness of a scanning part according to the display range information corresponding to the positive bit slice data and the positive bit slice data; and determining the height of a scanning bed for CT scanning according to the thickness of the scanning part. Therefore, the accurate correction of the height of the CT scanning bed can be realized without other auxiliary equipment, the equipment cost is effectively reduced, the automatic correction of the height of the scanning bed can be realized, and the accuracy of the height correction of the scanning bed is improved.
Description
Technical Field
The present disclosure relates to the field of computer technologies, and in particular, to a scanning bed calibration method, device, medium, and apparatus based on a positive slice.
Background
When the conventional scanning is performed based on CT (Computed Tomography), ideally, the center of the region of interest of the scanned human body should coincide with the rotation center of the CT scanning system, so as to avoid the problem that the scan dose of the region of interest of the scanned human body is not uniform when the positioning is eccentric, so that the image noise is not uniform and the image quality is affected.
In the related art, other visual auxiliary devices, such as a camera, are usually required for position correction, and this method requires additional devices and also causes increased operation difficulty and cost.
Disclosure of Invention
It is an object of the present disclosure to provide a method, apparatus, medium, and device for automatic and accurate positive slice-based scan bed calibration.
In order to achieve the above object, according to a first aspect of the present disclosure, there is provided a method for correcting a scanning bed based on an ortho-slice, the method comprising:
determining display range information corresponding to the positive bit slice data according to the acquired positive bit slice data, wherein the display range information comprises a starting position and an ending position;
determining the thickness of a scanning part according to the display range information corresponding to the positive bit slice data and the positive bit slice data;
and determining the height of a scanning bed for CT scanning according to the thickness of the scanning part.
Optionally, the determining the thickness of the scanned portion according to the display range information corresponding to the positive bit slice data and the positive bit slice data includes:
acquiring target positive bit slice data of a corresponding scanning part from the positive bit slice data according to display range information corresponding to the positive bit slice data and display range information of a target area for CT scanning;
and determining the thickness of the scanning part according to the target positive bit slice data.
Optionally, the method further comprises:
determining the coincidence proportion of the display range information of the target area and the display range information corresponding to the positive bit slice data;
the determining the thickness of the scanning part according to the target positive bit slice data comprises:
and under the condition that the coincidence proportion is larger than a preset threshold value, determining the thickness of the scanning part according to the target positive bit slice data.
Optionally, the determining the thickness of the scanning portion according to the target positive slice data includes:
merging the data of the receiving units corresponding to the same position in the moving direction of the scanning bed in the target positive bit slice data to obtain merged data corresponding to the target positive bit slice;
determining an attenuation area corresponding to the target area according to the combined data;
determining a thickness of the scan site from the attenuation area.
Optionally, determining an attenuation area S corresponding to the target region according to the merged data by the following formula:
wherein, N is used for representing the number of the receiving units;
r is used for representing the distance from the ray source to the scanning center;
alpha is used for representing the corresponding fan angle of the ray source;
μiliwhich is used to represent the integral of the attenuation of the radiation source over the attenuation path corresponding to the ith received data unit.
Optionally, the determining the thickness of the scanning site according to the attenuation area includes:
determining a first candidate thickness and a second candidate thickness from the attenuation area S by:
S＝π*Rx*Ry
wherein R isxIs the first candidate thickness, RyIs the second candidate thickness, and, Ry＝P*Rx；
P is used for representing the thickness ratio of the human body lying on one side to the human body lying on the back;
and determining the thickness of the scanning part according to the scanning type of the CT scanning, the first candidate thickness and the second candidate thickness.
Optionally, the determining the thickness of the scanning part according to the scanning type of the CT scanning, the first candidate thickness and the second candidate thickness includes:
if the scanning type of the CT scanning is a lying type, determining a double value of the first candidate thickness as the thickness of the scanning part;
and if the scanning type of the CT scanning is the lying type, determining a double value of the second candidate thickness as the thickness of the scanning part.
Optionally, the obtaining, from the positive slice data, target positive slice data of a corresponding scanning part according to display range information corresponding to the positive slice data and display range information of a target region for performing CT scanning includes:
determining the maximum value of the starting position corresponding to the positive bit slice data and the starting position of the target area as the corrected starting position of the target area;
determining the minimum value of the end position corresponding to the positive bit slice data and the end position of the target area as the end position of the corrected target area;
and determining data corresponding to the corrected starting position of the target area to the corrected ending position of the target area in the positive bit slice data as the target positive bit slice data.
According to a second aspect of the present disclosure, there is provided a positive slice-based scanning bed calibration apparatus, the apparatus comprising:
the device comprises a first determining module, a second determining module and a display module, wherein the first determining module is used for determining display range information corresponding to correct bit slice data according to the obtained correct bit slice data, and the display range information comprises a starting position and an ending position;
the second determining module is used for determining the thickness of the scanning part according to the display range information corresponding to the positive bit slice data and the positive bit slice data;
and the third determining module is used for determining the height of a scanning bed for carrying out CT scanning according to the thickness of the scanning part.
According to a third aspect of the present disclosure, there is provided a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of any of the methods of the first aspect.
According to a fourth aspect of the present disclosure, there is provided an electronic device comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method of any of the first aspects.
In the technical scheme, according to the acquired positive bit slice data, the display range information corresponding to the positive bit slice data is determined, and the thickness of the scanning part is determined according to the display range information corresponding to the positive bit slice data and the positive bit slice data; and determining the height of the scanning bed for CT scanning according to the thickness. Therefore, by the technical scheme, the height of the CT scanning bed can be accurately corrected without other auxiliary equipment, the central position point of the scanning part of the scanned human body is aligned with the rotation center of the scanning system, the equipment cost is effectively reduced, the efficiency and the imaging accuracy of CT scanning are ensured, and effective data support is provided for generating accurate CT scanning images. And, carry out automatic adjustment to the height of scanning bed through positive piece data to can guarantee the height of scanning bed and the human matching nature of being scanned, further promote user and use experience.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flowchart of a calibration method for scanning bed based on positive slice according to an embodiment of the disclosure;
FIG. 2 is a simplified schematic diagram of the acquired positive slice data;
FIG. 3 is a flow diagram of an exemplary implementation of determining a thickness of a scan site from target positive slice data;
FIG. 4 is a schematic illustration of a curve formed by merging data;
FIG. 5 is a block diagram of a table corrector based on positive slices according to an embodiment of the present disclosure;
FIG. 6 is a block diagram illustrating an electronic device in accordance with an exemplary embodiment;
FIG. 7 is a block diagram illustrating an electronic device in accordance with an example embodiment.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
CT scanning is commonly used in clinical medicine, and can be used for examination of various diseases by performing cross-sectional scanning one by one around a certain part of a human body with a highly sensitive detector using a precisely collimated X-ray beam, gamma rays, ultrasonic waves, and the like. Therefore, the accuracy requirement of CT scan imaging is relatively strict.
Therefore, if the center of rotation around the human body, i.e. the rotation center of the CT scanning system, is deviated from the center of the region of interest of the scanned human body during the CT scanning process, the scanning dose of the region of interest of the scanned human body during the rotation of the detector is not uniform, so that the image noise is inconsistent, the image quality is affected, and the accuracy of the scanning imaging is reduced.
In a practical application scenario, a medical staff may obtain a human body image through an orthotopic film, and the orthotopic film generally contains more information of a scanned human body, based on which, the present disclosure provides the following embodiments to correct the position of the scanning bed based on the orthotopic film, so as to improve the accuracy and efficiency of CT scanning imaging.
Fig. 1 is a flowchart of a calibration method for a scanning bed based on an orthophoto slice according to an embodiment of the disclosure, and as shown in fig. 1, the method includes:
in step 11, according to the acquired positive bit slice data, display range information corresponding to the positive bit slice data is determined, wherein the display range information includes a start position and an end position.
As shown in fig. 2, a simplified schematic diagram of the acquired positive slice data is shown, wherein the start position and the end position may be coordinate values in the Z direction. As shown in fig. 2, in the CT scanning system, the Z direction is the traveling direction of the scanning bed, i.e. the direction of the line on which the foot of the human body points to the head. The X-direction is the direction of the line on which the receiving units are arranged in the CT scanning system. As shown in fig. 2, in the Z direction, the start position is the minimum value of the positive slice data in the Z direction, and the end position is the maximum value of the positive slice data in the Z direction.
In step 12, the thickness of the scanned portion is determined based on the display range information corresponding to the positive bit slice data and the positive bit slice data.
The scanning part may be an integral part included in the positive bit slice data, or a local position part in the positive bit slice data, and may be set according to an actual application scenario or by a user, which is not limited by the present disclosure. The thickness of the scanning portion may be a difference between corresponding height values of the scanning portion in a gravity direction.
In step 13, the height of the scanning bed for CT scanning is determined based on the thickness of the scanned region.
Wherein the initial height of the scanning bed can be pre-labeled as the height value when the upper surface of the scanning bed is at the height of the center of the scanning field of view. In determining the thickness of the scanned area, the height DesHeight of the scanning bed can be determined by the following formula:
DesHeight＝Height–0.5*Thickness；
wherein, Height is used for representing the initial Height of the scanning bed;
thickness is used to denote the Thickness of the scanned site.
In the technical scheme, according to the acquired positive bit slice data, the display range information corresponding to the positive bit slice data is determined, and the thickness of the scanning part is determined according to the display range information corresponding to the positive bit slice data and the positive bit slice data; and determining the height of the scanning bed for CT scanning according to the thickness. Therefore, by the technical scheme, the height of the CT scanning bed can be accurately corrected without other auxiliary equipment, the central position point of the scanning part of the scanned human body is aligned with the rotation center of the scanning system, the equipment cost is effectively reduced, the efficiency and the imaging accuracy of CT scanning are ensured, and effective data support is provided for generating accurate CT scanning images. And, carry out automatic adjustment to the height of scanning bed through positive piece data to can guarantee the height of scanning bed and the human matching nature of being scanned, further promote user and use experience.
In one possible embodiment, in step 12, an exemplary implementation manner of determining the thickness of the scanning portion according to the display range information and the positive bit slice data corresponding to the positive bit slice data is as follows, and the step may include:
and acquiring target positive bit slice data of a corresponding scanning part from the positive bit slice data according to the display range information corresponding to the positive bit slice data and the display range information of a target area for CT scanning.
The target Region may be a Region of Interest (ROI) corresponding to CT scanning, which may be framed by a user through a display device. As shown in fig. 2, the Q region is a target region determined by the user in the positive bit slice data. Similarly, the display range information of the target area, i.e., the start position and the end position of the target area, may also be coordinate values in the Z direction. For example, the starting position is the minimum value of the target region in the Z direction, and the ending position is the maximum value of the target region in the Z direction. For example, data corresponding to the display range information of the target area in the positive slice data may be directly determined as the target positive slice data.
And then, determining the thickness of the scanning part according to the target positive bit slice data.
The thickness of each part of the human body is possibly different, generally, the thickness of the abdomen area is larger than that of the leg area, so that the thickness of the scanning part is determined, the central position point of the scanning part of the human body can be determined, the central position point of the scanning part is conveniently aligned with the rotation center of the scanning system, the accuracy of scanning and imaging in the CT scanning process is ensured, and accurate data support is provided for follow-up CT scanning.
In an actual application scenario, the display range of the target region for CT scanning may not be completely within the display range corresponding to the positive bit slice data, and therefore, the display range information of the target region needs to be corrected based on the display range information corresponding to the positive bit slice data, so as to accurately obtain the scanning data of the target region.
In a possible embodiment, an exemplary implementation manner of obtaining target positive bit slice data of a corresponding scanning part from the positive bit slice data according to display range information corresponding to the positive bit slice data and display range information of a target region for performing CT scanning is as follows, and the step may include:
determining the maximum value of the starting position corresponding to the positive bit slice data and the starting position of the target area as the corrected starting position of the target area;
determining the minimum value of the end position corresponding to the positive bit slice data and the end position of the target area as the end position of the corrected target area;
and determining data corresponding to the corrected starting position of the target area to the corrected ending position of the target area in the positive bit slice data as the target positive bit slice data.
As shown in fig. 2, the display range information corresponding to the positive bit slice data may be expressed as: the start position PltS, the end position PltE, and the display range information of the target area Q before correction can be expressed as: a start position ROIS1 and an end position ROIE 1. After correcting the display range information of the target area Q based on the display range information corresponding to the positive bit slice data, then:
the corrected start position ROIS1 ═ max (ROIS1, PltS) ═ ROIS 1;
the corrected start position ROIE 1' min (ROIE1, PltE) ═ ROIE 1.
As another example, as shown in fig. 2, when the display range information of the target area W is corrected:
the corrected start position ROIS2 ═ max (ROIS2, PltS) ═ ROIS 2;
the corrected start position ROIE 2' min (ROIE2, PltE) ═ PltE.
Therefore, according to the technical scheme, the display range information of the target area can be corrected based on the display range information corresponding to the positive bit slice data, so that data errors caused when the data required in the target area is not in the positive bit slice data can be avoided, and the accuracy and the compatibility of the target positive bit slice data acquisition are ensured.
In a possible embodiment, the method further comprises:
and determining the superposition proportion of the display range information of the target area and the display range information corresponding to the positive bit slice data.
The total length of the target area may be determined based on the display range information of the target area, that is, a difference between the ending position and the starting position is determined as the total length of the target area, and a ratio of a length corresponding to the positive bit slice data in the target area to the total length is determined as the overlapping ratio. As an example, the ratio of the length of the display range information of the corrected target area to the total length may be determined as the overlap ratio.
Accordingly, an exemplary implementation of determining the thickness of the scan site from the target positive slice data is as follows, which may include:
and under the condition that the coincidence proportion is larger than a preset threshold value, determining the thickness of the scanning part according to the target positive bit slice data.
The preset threshold may be set based on an actual usage scenario, which is not limited by the present disclosure. Under the condition that the coincidence proportion is larger than the preset threshold value, the fact that most areas in the target area are correspondingly represented in the positive slice data is shown, namely the positive slice data in the target area can relatively accurately represent the characteristics in the target area, the thickness of a scanning part corresponding to the target area is relatively accurate according to the positive slice data, the thickness of the scanning part can be determined according to the target positive slice data, and then the height of the scanning bed is determined and adjusted, so that the accuracy of correcting the position of the scanning bed is guaranteed.
Therefore, according to the technical scheme, under the condition that most information in the target area is correspondingly displayed in the positive slice data, the thickness of the corresponding scanning part is calculated according to the target positive slice data, on one hand, the accuracy of the thickness calculation can be guaranteed, on the other hand, the matching performance of adjusting the height of the scanning bed based on the positive slice data can be guaranteed, the influence of height adjustment on the scanning imaging accuracy based on local features in the target area is avoided, the accuracy of the scanning bed correction method based on the positive slice is improved, and the use experience of a user is improved.
In one possible embodiment, an exemplary implementation of determining the thickness of the scan site from the target normal bit slice data is as follows, as shown in fig. 3, which may include:
in step 31, the data of the receiving units corresponding to the same position in the moving direction of the scanning bed in the target normal slice data are merged to obtain merged data corresponding to the target normal slice.
The scanning bed is arranged in the Z direction, the arrangement direction of the receiving units is in the X direction, and accordingly, the target positive bit slice data can be represented by an array of M × N, wherein M is used for representing the number of Z upward samples, and N is used for representing the number of the receiving units in the arrangement of the receiving units.
As an example, data of receiving units corresponding to the same position in the scanning bed traveling direction in the target positive slice data may be subjected to averaging processing for combination, so that an array of 1 × N, that is, the combined data, may be obtained.
In step 32, the attenuation area corresponding to the target region is determined based on the merged data.
The attenuation area of the target region may be an area corresponding to a curve formed by the combined data, that is, an area formed by data received by the receiving unit after the radiation source scans the attenuation of the human body, as shown in fig. 4, the attenuation area is a curve formed by the combined data.
For example, the attenuation area S corresponding to the target region may be determined according to the merged data by the following formula:
wherein, N is used for representing the number of the receiving units;
r is used for representing the distance from the ray source to the scanning center;
alpha is used for representing the corresponding fan angle of the ray source;
μiliwhich is used to represent the integral of the attenuation of the radiation source over the attenuation path corresponding to the ith received data unit.
Therefore, the area corresponding to the curve formed by the merged data can be determined based on the relevant information of the ray source and the integral calculation mode, so that the section area of the scanned part is determined, the thickness of the scanned part can be determined based on the section area, the calculation method is simple and rapid, and the calculation data amount can be reduced to a certain extent.
In step 33, the thickness of the scanned portion is determined from the attenuation area.
Wherein, the human body part can be approximately in an elliptical shape. Thus, an exemplary implementation of determining the thickness of the scan site from the attenuation area is as follows, which may include:
determining a first candidate thickness and a second candidate thickness from the attenuation area S by:
S＝π*Rx*Ry
wherein R isxIs the first candidate thickness, RyIs the second candidate thickness, and, Ry＝P*Rx；
P is used to represent the thickness ratio of the human body lying on its side to the human body lying on its side.
Wherein, P can be obtained by detecting a large amount of human body data in advance. For example, the thickness ratio of the human body lying on side and the human body lying on flat corresponding to the multiple human body data corresponding to the same scanning part may be collected in advance, so that the comprehensive thickness ratio of the scanning part may be determined according to the multiple thickness ratios. Through the mode, the thickness ratio corresponding to the scanning parts can be determined, illustratively, the thickness ratio P of the head of the human body is 1.0, the thickness ratio P of the shoulder of the human body is 1.4, and the thickness ratio P of the abdomen of the human body is 1.2. As an example, after the scanning portion is determined, the value of P may be determined as the comprehensive thickness ratio corresponding to the scanning portion, so that the first candidate thickness and the second candidate thickness may be determined under the condition that the attenuation area is determined, and the efficiency of data calculation is improved.
As another example, for each scanning part, while acquiring thickness ratios corresponding to a plurality of human body data, one or more of height, weight, sex, age and other related information corresponding to the human body data may be acquired, and then the correspondence between the information and the thickness ratios may be acquired. Therefore, when the first candidate thickness and the second candidate thickness are determined by the formula, the thickness ratio corresponding to the scanned human body can be obtained according to the related information of the currently scanned human body and the corresponding relation, so that the accuracy of the thickness ratio is ensured, the accuracy of the determined first candidate thickness and the determined second candidate thickness is further improved, and accurate data support is provided for the subsequent accurate correction of the position of the scanning bed.
And then determining the thickness of the scanning part according to the scanning type of the CT scanning, the first candidate thickness and the second candidate thickness.
Wherein, for same scanning position when carrying out CT scanning, the thickness when being scanned human lying and lying on one's side is generally different, consequently, can accurately determine the thickness at this scanning position through combining this scanning type in this disclosed embodiment, for follow-up height adjustment based on this thickness to the scanning bed provides accurate data basis, user's user demand and use scene can laminate simultaneously, further promote user and use experience.
In one possible embodiment, an exemplary implementation of determining the thickness of the scan site according to the scan type of the CT scan, the first candidate thickness and the second candidate thickness is as follows, which may include:
and if the scanning type of the CT scanning is a lying type, determining a double value of the first candidate thickness as the thickness of the scanning part.
And if the scanning type of the CT scanning is the lying type, determining a double value of the second candidate thickness as the thickness of the scanning part.
As described above, since the cross-sectional shape of the scanned body is similar to an ellipse, when the scanned body lies flat for CT scanning, the thickness of the scanned portion is similar to the length of the minor axis of the ellipse, i.e., twice the first candidate thickness, and the twice the first candidate thickness can be determined as the thickness of the scanned portion. When the scanned human body lies on its side for CT scanning, the thickness of the scanned part is similar to the length of the major axis of the ellipse, i.e. twice the second candidate thickness, and the twice the second candidate thickness can be determined as the thickness of the scanned part.
Therefore, by means of the technical scheme, the thickness of the scanning part can be determined through the scanning type and the approximate calculation of the scanning part of the scanned human body, the determined thickness is matched with the form of the scanned human body, and the accuracy of the determined thickness is effectively guaranteed while the thickness determination efficiency is improved.
The present disclosure also provides a scanning bed calibration apparatus based on positive slice, as shown in fig. 5, the apparatus 10 includes:
a first determining module 100, configured to determine, according to the obtained positive bit slice data, display range information corresponding to the positive bit slice data, where the display range information includes a start position and an end position;
a second determining module 200, configured to determine the thickness of the scanned portion according to the display range information corresponding to the positive bit slice data and the positive bit slice data;
a third determining module 300, configured to determine a height of a scanning bed for performing CT scanning according to the thickness.
Optionally, the second determining module includes:
the first determining submodule is used for acquiring target positive bit slice data of a corresponding scanning part from the positive bit slice data according to display range information corresponding to the positive bit slice data and display range information of a target area for carrying out CT scanning;
and the second determining submodule is used for determining the thickness of the scanning part according to the target positive bit slice data.
Optionally, the apparatus further comprises:
the fourth determining module is used for acquiring the superposition proportion of the display range information of the target area and the display range information corresponding to the positive bit slice data;
the second determination submodule includes:
and under the condition that the coincidence proportion is larger than a preset threshold value, determining the thickness of the scanning part according to the target positive bit slice data.
Optionally, the second determining sub-module includes:
a merging submodule, configured to merge data of receiving units corresponding to the same position in the moving direction of the scanning bed in the target positive slice data, so as to obtain merged data corresponding to the target positive slice;
a third determining submodule, configured to determine, according to the merged data, an attenuation area corresponding to the target region;
and the fourth determining submodule is used for determining the thickness of the scanning part according to the attenuation area.
Optionally, the third determining submodule determines, according to the merged data, an attenuation area S corresponding to the target region by using the following formula:
wherein, N is used for representing the number of the receiving units;
r is used for representing the distance from the ray source to the scanning center;
alpha is used for representing the corresponding fan angle of the ray source;
μiliwhich is used to represent the integral of the attenuation of the radiation source over the attenuation path corresponding to the ith received data unit.
Optionally, the fourth determining sub-module includes:
a fifth determination submodule for determining a first candidate thickness and a second candidate thickness from the attenuation area S by the following formula:
S＝π*Rx*Ry
wherein R isxIs the first candidate thickness, RyIs the second candidate thickness, and, Ry＝P*Rx；
P is used for representing the thickness ratio of the human body lying on one side to the human body lying on the back;
and the sixth determining submodule is used for determining the thickness of the scanning part according to the scanning type of the CT scanning, the first candidate thickness and the second candidate thickness.
Optionally, the sixth determining sub-module includes:
a seventh determining sub-module, configured to determine, when a scan type of the CT scan is a lying type, a double value of the first candidate thickness as a thickness of the scan portion;
an eighth determining sub-module, configured to determine, when the scan type of the CT scan is a lying-on type, a double value of the second candidate thickness as the thickness of the scan portion.
Optionally, the first determining sub-module includes:
a first correction submodule, configured to determine a maximum value between a start position corresponding to the positive bit slice data and a start position of the target area as a corrected start position of the target area;
a second correction submodule, configured to determine a minimum value between an end position corresponding to the positive bit slice data and an end position of the target area as a corrected end position of the target area;
a ninth determining submodule, configured to determine, as the target positive slice data, data corresponding to a range from a start position of the corrected target region to an end position of the corrected target region in the positive slice data.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 6 is a block diagram illustrating an electronic device 700 according to an example embodiment. As shown in fig. 6, the electronic device 700 may include: a processor 701 and a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input/output (I/O) interface 704, and a communication component 705.
The processor 701 is configured to control the overall operation of the electronic device 700 to complete all or part of the steps of the above-mentioned method for correcting a scanning bed based on an orthophoto slice. The memory 702 is used to store various types of data to support operation at the electronic device 700, such as instructions for any application or method operating on the electronic device 700 and application-related data, such as contact data, transmitted and received messages, pictures, audio, video, and the like. The Memory 702 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk. The multimedia components 703 may include screen and audio components. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may further be stored in the memory 702 or transmitted through the communication component 705. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 704 provides an interface between the processor 701 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, which is not limited herein. The corresponding communication component 705 may thus include: Wi-Fi module, Bluetooth module, NFC module, etc.
In an exemplary embodiment, the electronic Device 700 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described positive slice based scan bed calibration method.
In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the above-described method for orthoslice based scan bed correction is also provided. For example, the computer readable storage medium may be the memory 702 described above that includes program instructions executable by the processor 701 of the electronic device 700 to perform the above-described method for positive slice based scan bed correction.
Fig. 7 is a block diagram illustrating an electronic device 1900 according to an example embodiment. For example, the electronic device 1900 may be provided as a server. Referring to fig. 7, an electronic device 1900 includes a processor 1922, which may be one or more in number, and a memory 1932 to store computer programs executable by the processor 1922. The computer program stored in memory 1932 may include one or more modules that each correspond to a set of instructions. Further, the processor 1922 may be configured to execute the computer program to perform the above-described positive slice based scan bed correction method.
Additionally, electronic device 1900 may also include a power component 1926 and a communication component 1950, the power component 1926 may be configured to perform power management of the electronic device 1900, and the communication component 1950 may be configured to enable communication, e.g., wired or wireless communication, of the electronic device 1900. In addition, the electronic device 1900 may also include input/output (I/O) interfaces 1958. The electronic device 1900 may operate based on an operating system, such as Windows Server, stored in memory 1932TM，Mac OSXTM，UnixTM，LinuxTMAnd so on.
In another exemplary embodiment, a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the above-described method for orthoslice based scan bed correction is also provided. For example, the non-transitory computer readable storage medium may be the memory 1932 described above that includes program instructions executable by the processor 1922 of the electronic device 1900 to perform the above-described method of orthoslice based scan bed correction.
In another exemplary embodiment, a computer program product is also provided, which comprises a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described method of orthoslice-based scan bed correction when executed by the programmable apparatus.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure. For example.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (11)
1. A scanning bed correction method based on a positive slice is characterized by comprising the following steps:
determining display range information corresponding to the positive bit slice data according to the acquired positive bit slice data, wherein the display range information comprises a starting position and an ending position;
determining the thickness of a scanning part according to the display range information corresponding to the positive bit slice data and the positive bit slice data;
and determining the height of a scanning bed for CT scanning according to the thickness of the scanning part.
2. The method according to claim 1, wherein the determining the thickness of the scanned portion according to the display range information corresponding to the positive bit slice data and the positive bit slice data comprises:
acquiring target positive bit slice data of a corresponding scanning part from the positive bit slice data according to display range information corresponding to the positive bit slice data and display range information of a target area for CT scanning;
and determining the thickness of the scanning part according to the target positive bit slice data.
3. The method of claim 2, further comprising:
determining the coincidence proportion of the display range information of the target area and the display range information corresponding to the positive bit slice data;
the determining the thickness of the scanning part according to the target positive bit slice data comprises:
and under the condition that the coincidence proportion is larger than a preset threshold value, determining the thickness of the scanning part according to the target positive bit slice data.
4. The method of claim 2 or 3, wherein determining the thickness of the scanned region from the target positive slice data comprises:
merging the data of the receiving units corresponding to the same position in the moving direction of the scanning bed in the target positive bit slice data to obtain merged data corresponding to the target positive bit slice;
determining an attenuation area corresponding to the target area according to the combined data;
determining a thickness of the scan site from the attenuation area.
5. The method of claim 4, wherein the attenuation area S corresponding to the target region is determined from the merged data by the following formula:
wherein, N is used for representing the number of the receiving units;
r is used for representing the distance from the ray source to the scanning center;
alpha is used for representing the corresponding fan angle of the ray source;
μiliwhich is used to represent the integral of the attenuation of the radiation source over the attenuation path corresponding to the ith received data unit.
6. The method of claim 4, wherein determining the thickness of the scan site from the attenuation area comprises:
determining a first candidate thickness and a second candidate thickness from the attenuation area S by:
S＝π*Rx*Ry
wherein R isxIs the first candidate thickness, RyIs the second candidate thickness, and, Ry＝P*Rx；
P is used for representing the thickness ratio of the human body lying on one side to the human body lying on the back;
and determining the thickness of the scanning part according to the scanning type of the CT scanning, the first candidate thickness and the second candidate thickness.
7. The method of claim 6, wherein determining the thickness of the scan site from the scan type of the CT scan, the first candidate thickness, and the second candidate thickness comprises:
if the scanning type of the CT scanning is a lying type, determining a double value of the first candidate thickness as the thickness of the scanning part;
and if the scanning type of the CT scanning is the lying type, determining a double value of the second candidate thickness as the thickness of the scanning part.
8. The method according to claim 2, wherein the obtaining target normal bit slice data corresponding to the scanning part from the normal bit slice data according to the display range information corresponding to the normal bit slice data and the display range information of the target region for performing the CT scan comprises:
determining the maximum value of the starting position corresponding to the positive bit slice data and the starting position of the target area as the corrected starting position of the target area;
determining the minimum value of the end position corresponding to the positive bit slice data and the end position of the target area as the end position of the corrected target area;
and determining data corresponding to the corrected starting position of the target area to the corrected ending position of the target area in the positive bit slice data as the target positive bit slice data.
9. A device for correcting a scanning bed based on a positive slice, the device comprising:
the device comprises a first determining module, a second determining module and a display module, wherein the first determining module is used for determining display range information corresponding to correct bit slice data according to the obtained correct bit slice data, and the display range information comprises a starting position and an ending position;
the second determining module is used for determining the thickness of the scanning part according to the display range information corresponding to the positive bit slice data and the positive bit slice data;
and the third determining module is used for determining the height of a scanning bed for carrying out CT scanning according to the thickness of the scanning part.
10. A non-transitory computer readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
11. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to carry out the steps of the method of any one of claims 1 to 8.
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