CN111317495B - CT image data processing method and CT imaging system - Google Patents
CT image data processing method and CT imaging system Download PDFInfo
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- 238000013170 computed tomography imaging Methods 0.000 title claims abstract description 32
- 238000003672 processing method Methods 0.000 title abstract description 3
- 238000000034 method Methods 0.000 claims abstract description 37
- 238000009432 framing Methods 0.000 claims abstract description 6
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- 230000005540 biological transmission Effects 0.000 claims description 5
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- 238000002591 computed tomography Methods 0.000 description 53
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- 210000002517 zygapophyseal joint Anatomy 0.000 description 5
- 230000004069 differentiation Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4208—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
- A61B6/4241—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using energy resolving detectors, e.g. photon counting
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
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- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
Abstract
The application provides a processing method of CT image data and a CT imaging system, which are used for reducing the transmitted data volume. The method comprises the following steps: receiving scanning information which is sent by a control console and comprises data acquisition parameters and data processing parameters of each main detector module and each auxiliary detector module; the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different; respectively sending each data acquisition parameter to the corresponding photon counting detector module; for each photon counting detector module, acquiring CT image data acquired by the module according to the received data acquisition parameters, and processing the CT image data according to the data processing parameters of the module; framing the processed CT image data of all the main detector modules and all the auxiliary detector modules to obtain a target data frame; and transmitting the target data frame to an image reconstruction system through a slip ring so as to reconstruct a CT image of the detected body.
Description
Technical Field
The present application relates to the field of medical image technology, and in particular, to a method for processing CT image data and a CT imaging system.
Background
Computed Tomography (CT) is a relatively common medical imaging technique that scans a slice of an object (e.g., a human body) with X-rays. As shown in fig. 1, a CT imaging system generally includes a data acquisition system 10, a console 20, a slip ring 30 and an image reconstruction system 40, wherein the data acquisition system 10 includes a plurality of detector modules, the console 20 configures the same data acquisition and processing parameters for each detector module and sends the parameters to the data acquisition system 10, and the data acquisition system 10 and the image reconstruction system 30 perform data interaction through the slip ring 20.
The Detector modules mainly used in the current CT imaging system include a Charge integrating Detector (Charge integrating Detector) module and a Photon Counting Detector (Photon Counting Detector) module. Compared with the CT imaging system using the charge integration type detector module, the CT imaging system using the photon counting detector module can effectively improve the imaging quality and the signal to noise ratio, but the acquired data volume is larger. The CT imaging system using the photon counting detector module has a large data volume and a limited slip ring bandwidth, so that the real-time performance of data transmission is adversely affected.
Disclosure of Invention
In view of the above, the present application provides a method for processing CT image data and a CT imaging system, so as to reduce the amount of data to be transmitted, thereby improving the real-time performance of data transmission.
In a first aspect, an embodiment of the present application provides a method for processing CT image data, where the method is used for a main processor in a CT imaging system, the CT imaging system includes a data acquisition system, a console, a slip ring, and an image reconstruction system, the data acquisition system includes a plurality of photon counting detector modules and the main processor, and the method includes:
receiving scanning information sent by the console; wherein the scanning information comprises: data acquisition parameters and data processing parameters of each main detector module and each auxiliary detector module; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range, and the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
respectively sending each data acquisition parameter to a corresponding photon counting detector module;
for each photon counting detector module, acquiring CT image data acquired by the photon counting detector module according to received data acquisition parameters, and processing the CT image data according to data processing parameters of the photon counting detector module;
framing the processed CT image data of all the main detector modules and all the auxiliary detector modules to obtain a target data frame;
and transmitting the target data frame to the image reconstruction system through the slip ring so as to reconstruct a CT image of the detected body.
In a possible implementation, the data acquisition parameters include: resolution, number of energy levels, and energy levels;
the primary detector module and the secondary detector module have different at least one of resolution, number of energy levels, and energy levels.
In a possible implementation manner, each photon counting detector module includes at least one layer, each layer includes at least one channel, each channel corresponds to one sensor, and data acquired by each channel is divided according to energy level;
the data processing parameters include: compression parameters in the channel direction, compression parameters in the layer direction and energy level extraction parameters;
and at least one of the compression parameters in the channel direction, the compression parameters in the layer direction and the energy level extraction parameters of the main detector module and the auxiliary detector module are different.
In a possible implementation manner, the scanning information further includes: module identification of each of the main detector module and the auxiliary detector module;
the sending each data acquisition parameter to the corresponding photon counting detector module respectively comprises:
for each main detector module, sending data acquisition parameters corresponding to the module identification to the main detector module according to the module identification of the main detector module;
and for each auxiliary detector module, sending the data acquisition parameters corresponding to the module identification to the auxiliary detector module according to the module identification of the auxiliary detector module.
In a possible implementation, the CT image data includes a module identification of the photon counting detector module;
the processing the CT image data according to the data processing parameters of the photon counting detector module comprises:
acquiring the module identification in the CT image data;
searching a data processing parameter corresponding to the module identifier;
and processing the CT image data according to the data processing parameters corresponding to the module identification.
In a second aspect, the present application provides a method for processing CT image data, where the method is used in a console of a CT imaging system, the CT imaging system includes a data acquisition system, the console, a slip ring, and an image reconstruction system, the data acquisition system includes a plurality of photon counting detector modules and a main processor, and the method includes:
respectively determining a main detector module and an auxiliary detector module in the plurality of photon counting detector modules according to the checked part of the checked body and the set scanning visual field; the main detector module is a photon counting detector module positioned in a projection area of an examination part of a detected body, and the auxiliary detector module is a photon counting detector module positioned in other areas except the projection area in a scanning visual field range;
configuring data acquisition parameters and data processing parameters of each main detector module and each auxiliary detector module; the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
sending scan information to the data acquisition system, the scan information comprising: and data acquisition parameters and data processing parameters of the main detector module and the auxiliary detector module.
In a possible implementation manner, the scanning information further includes: module identification of each of the main detector module and the auxiliary detector module;
before sending scan information to the data acquisition system, the method further comprises:
associating the module identification of the main detector module with the data acquisition parameters and data processing parameters of the main detector module;
and associating the module identification of the auxiliary detector module with the data acquisition parameters and the data processing parameters of the auxiliary detector module.
In a third aspect, an embodiment of the present application further provides a data acquisition system, where the data acquisition system includes a plurality of photon counting detector modules and a main processor;
the photon counting detector module is configured to acquire CT image data according to the received data acquisition parameters and transmit the CT image data to the main processor;
the main processor comprises means for performing the method for processing CT image data of the first aspect or any possible implementation manner of the first aspect.
In a fourth aspect, the present application further provides a console, where the console includes a module for executing the method for processing CT image data in the second aspect or any possible implementation manner of the second aspect.
In a fifth aspect, an embodiment of the present application further provides a CT imaging system, including:
the data acquisition system provided by any embodiment of the application, the console, the slip ring and the image reconstruction system provided by any embodiment of the application;
the control console is connected with the data acquisition system, and the slip ring is connected with the data acquisition system and the image reconstruction system.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are configured to be different, so that the photon counting detector modules are subjected to differential processing, the transmitted data volume is reduced, and the real-time performance of data transmission is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art CT imaging system;
FIG. 2 is a schematic structural diagram of a CT imaging system according to an embodiment of the present application;
fig. 3 is a schematic diagram of a data format provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a console in a CT imaging system according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of a CT imaging system according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of another CT imaging system according to an exemplary embodiment of the present disclosure;
FIG. 7 is a schematic structural diagram of a console of a CT imaging system according to an embodiment of the present disclosure;
FIG. 8 is a schematic structural diagram of a main processor in a CT imaging system according to an embodiment of the present disclosure;
fig. 9 is a schematic flowchart of a method for processing CT image data on a main processor side according to an embodiment of the present application;
fig. 10 is a flowchart illustrating a method for processing CT image data on a console side according to an embodiment of the present application.
Detailed Description
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 embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application 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 application. The word "if," as used herein, may be interpreted as "at \8230; \8230when" or "when 8230; \823030when" or "in response to a determination," depending on the context.
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.
Referring to fig. 2, an embodiment of the present application provides a CT imaging system, including: the system comprises a data acquisition system 10, a console 20, a slip ring 30 and an image reconstruction system 40, wherein the console 20 is connected with the data acquisition system 10, and the slip ring 30 is connected with the data acquisition system 10 and the image reconstruction system 40.
As shown in fig. 2, the data acquisition system 10 includes a plurality of photon counting detector modules 101 and a main processor 102; for example, data acquisition system 10 includes N photon counting detector modules, photon counting detector module 1, photon counting detector module 2, \8230;, photon counting detector module N, respectively.
Each photon counting detector module 101 includes at least one layer, each layer includes at least one channel, each channel corresponds to one sensor, and data collected by each channel is divided according to energy level (or energy interval). Generally, the photon counting detector modules are arranged along the channel direction, and it can be understood that the greater the number of photon counting detector modules in the data acquisition system 10, the greater the number of channels, but the number of layers remains the same.
In this embodiment, the number of energy levels can be set according to actual needs, and the more the number of energy levels is, the larger the data volume that the photon counting detector module collected will be.
A photon counting detector module 101 (DM for short) configured to acquire CT image data according to the received data acquisition parameters and transmit the CT image data to the main processor 102. The photon counting detector module 101 may include a plurality of sensors, an analog-to-digital converter, a front-end processor, and peripheral circuitry. The photon counting detector module 101 may convert scanning radiation (e.g., X-rays) penetrating through the subject into an analog signal through a sensor, convert the analog signal into a digital signal through an analog-to-digital converter, process the digital signal by using a front-end processor, and output the digital signal to the main processor 102 according to a predetermined data format.
In some embodiments, the predetermined data format may be as shown in fig. 3, where the data output by the photon counting detector module 101 includes a data header and data of each energy level, the data header includes a module Identifier (ID) of the photon counting detector module 101, the ID of the photon counting detector module 101 may be, for example, a number of the photon counting detector module 101, M indicates the number of the energy levels, the data of the same energy level is stored in the same field, for example, data of a first energy level (i.e., energy level 1 in fig. 3) on all channels of the photon counting detector module 101 collected at the same time is stored in a field corresponding to the first energy level, for data of each energy level, the data of the energy level includes the energy level header and the data of each layer, S indicates the number of the channels on the same layer, for example, the data of a first layer (i.e., data of layer 1 in fig. 3) is stored in a field corresponding to the first channel, and for data of each layer, L indicates the number of the channels on the layer, and the data of the same channel is stored in a field, for example, data of a third layer (i.e., data of the channel (i.e., data of layer 1) in the channel corresponding to the channel in fig. 3) is stored in the same field.
As shown in fig. 4, the console 20 may include:
a detector definition module 201 configured to determine a main detector module and an auxiliary detector module of the plurality of photon counting detector modules, respectively, according to an examination part of the subject and a set scanning field of view; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, and the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range;
a parameter configuration module 202 configured to configure data acquisition parameters and data processing parameters of each of the main detector module and the auxiliary detector module; the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
a scan information sending module 203 configured to send scan information to the data acquisition system, the scan information comprising: and data acquisition parameters and data processing parameters of the main detector module and the auxiliary detector module.
In the embodiment of the present application, the scan information may further include an examination portion, a scan time, a scan field of view (FOV), and the like. The examination site may be, for example, a heart, a facet joint, a small organ, etc.
In some embodiments, referring to fig. 5, the console may divide all photon counting detector modules in the CT imaging system into a main detector module 51 and an auxiliary detector module 52 according to an examination site (e.g., heart) of a subject and a set scanning field of view, wherein the main detector module 51 is a photon counting detector module located in a projection region 53 of the examination site of the subject, and the auxiliary detector module 52 is a photon counting detector module located in a region 54 other than the projection region 53 within the scanning field of view.
In other embodiments, referring to fig. 6, the console may divide all photon counting detector modules in the CT imaging system into a main detector module 51, an auxiliary detector module 52 and an undefined detector module 61 according to an examination part (e.g. facet joint) of the subject and a set scanning field of view, wherein the main detector module 51 is a photon counting detector module located in a projection region 53 of the examination part of the subject, the auxiliary detector module 52 is a photon counting detector module located in a region 54 other than the projection region 53 within the scanning field of view, and the undefined detector module 61 is a photon counting detector module not located within the scanning field of view (i.e. a region 62 in fig. 6).
It should be noted that in the embodiment of the present application, for the undefined detector module 61, either the undefined detector module 61 is controlled not to acquire data, or the data acquired by the undefined detector module 61 is discarded.
In some embodiments, the data acquisition parameters include: resolution, number of energy levels, and energy levels;
the primary detector module differs from the secondary detector module in at least one of resolution, number of energy levels, or energy level.
Generally, during imaging, the data required by the auxiliary detector module is less than the data required by the main detector module, so that the main detector module can be set to have high resolution and more energy levels, and the auxiliary detector module can be set to have low resolution and less energy levels.
In some embodiments, the data processing parameters include: compression parameters in the channel direction, compression parameters in the layer direction and energy level extraction parameters;
and at least one of the compression parameters in the channel direction, the compression parameters in the layer direction and the energy level extraction parameters of the main detector module and the auxiliary detector module are different.
Generally, data required by the auxiliary detector module is less than data required by the main detector module during imaging, so that a compression parameter in a channel direction and a compression parameter in a layer direction of the main detector module can be set to be 0 (that is, data acquired by the main detector module is not compressed), all CT image data acquired by the main detector module is reserved, only data of a specific energy level is taken for the CT image data acquired by the auxiliary detector module, and compression in the channel direction and compression in the layer direction are performed.
In some embodiments, the scanning information may further include: module identification of each of the main detector module and the auxiliary detector module;
as shown in fig. 7, the console 20 further includes:
an association module 204 configured to associate a module identification of the primary detector module with data acquisition parameters and data processing parameters of the primary detector module prior to sending scan information to the data acquisition system; and associating the module identification of the auxiliary detector module with the data acquisition parameters and the data processing parameters of the auxiliary detector module.
As shown in fig. 8, the main processor 102 may include:
a scan information receiving module 1021 configured to receive scan information transmitted by the console;
wherein the scanning information comprises: data acquisition parameters and data processing parameters of each main detector module and each auxiliary detector module; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range, and the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
an acquisition parameter sending module 1022 configured to send each of the data acquisition parameters to a corresponding photon counting detector module;
a data processing module 1023, configured to, for each of the photon counting detector modules, acquire CT image data acquired by the photon counting detector module according to the received data acquisition parameters, and process the CT image data according to the data processing parameters of the photon counting detector module;
a framing module 1024 configured to frame the processed CT image data of all the main detector modules and all the auxiliary detector modules to obtain a target data frame;
a data transmission module 1025 configured to transmit the target data frame to an image reconstruction system via a slip ring to reconstruct a CT image of the subject.
In this embodiment, the data frame may include a header of the data frame, CT image data of all the main detector modules and CT image data of all the auxiliary detector modules, and data of the same detector module is stored in the same field, for example, data of the detector module N is stored in a field corresponding to the detector module N.
In some embodiments, the main processor 102 may include a processor (e.g., an FPGA chip), a memory, and peripheral circuitry.
In some embodiments, as shown in fig. 2, the data acquisition system 10 may further include: a storage device 103. The storage device 103 may be a memory chip, a memory bank, a solid state disk, or the like, and the storage device 103 is configured to cache data acquired by the photon counting detector module 101.
In some embodiments, the scanning information further comprises: module identification of each of the main detector module and the auxiliary detector module;
the acquisition parameter sending module 1022 is configured to:
for each main detector module, sending data acquisition parameters corresponding to the module identification to the main detector module according to the module identification of the main detector module;
and for each auxiliary detector module, sending the data acquisition parameters corresponding to the module identification to the auxiliary detector module according to the module identification of the auxiliary detector module.
In this embodiment, the main processor 102 may send the data acquisition parameters of each photon counting detector module to the corresponding photon counting detector module 101 through the configuration bus.
For example, the main processor 102 configures a configuration frame for each photon counting detector module 101, where the configuration frame includes a module identifier of the photon counting detector module 101 and a data acquisition parameter of the photon counting detector module 101, and then sends out each configuration frame through the configuration bus, and when the photon counting detector module 101 recognizes that the module identifier in the configuration frame is the same as the module identifier of the photon counting detector module 101, the configuration frame is received, and then, the photon counting detector module 101 extracts the data acquisition parameter from the configuration frame and acquires CT image data according to the data acquisition parameter.
In some embodiments, the CT image data of a photon counting detector module includes a module identification of the photon counting detector module;
the data processing module 1023 is configured to:
acquiring the module identification in the CT image data;
searching a data processing parameter corresponding to the module identifier;
and processing the CT image data according to the data processing parameters corresponding to the module identification.
The technical solutions provided in the present application will be described below by taking the examination site as the heart and the examination site as the facet joint, respectively, as examples.
The first embodiment is as follows:
in the technical scheme provided by the embodiment of the application, the examined part is a heart, the heart is located in the left half part of a human body, and in the scanning process, only the left half part of the detector modules are actually located under the orthographic projection of the heart, so the console can define the left half part of the detector modules as the main detector modules and the right half part of the detector modules as the auxiliary detector modules, then the console can configure the same data acquisition parameters and different data processing parameters for the main detector modules and the auxiliary detector modules, and send scanning information containing the data acquisition parameters and the data processing parameters of the main detector modules and the auxiliary detector modules to the data acquisition system, the data acquisition system carries out differentiation processing on the photon counting detector modules according to the received scanning information, and then frames CT image data of all the main detector modules and all the auxiliary detector modules after processing are transmitted to the image reconstruction system through the slip ring so as to reconstruct CT images of the examined bodies.
For example, the compression parameter of the main detector module in the channel direction and the compression parameter of the main detector module in the layer direction may be set to 0 (i.e., the data acquired by the main detector module is not compressed), all the CT image data acquired by the main detector module is retained, only data of one energy level is extracted from the CT image data acquired by the auxiliary detector module, and the compression in the channel direction and the compression in the layer direction are performed.
After the processing, the data volume of the auxiliary detector module is greatly reduced, all data of the main detector module are reserved, the imaging quality is ensured, and meanwhile, the transmitted data volume is reduced.
Example two:
in the technical scheme provided by the embodiment of the application, the detected part is a facet joint, for the purpose of clearly seeing focus in imaging scanning of some facet joints, the resolution requirement of a main detector module under orthographic projection of the scanned part is higher, the resolution of an auxiliary detector module under non-projection can be reduced, in addition, in the scanning, the scanning visual field controlled by a collimator is very small, and not all detector modules collect photons. Therefore, the console can configure different data acquisition parameters (such as different resolutions) and the same or different data processing parameters for the main detector module and the auxiliary detector module, and send scanning information containing the data acquisition parameters and the data processing parameters of each main detector module and the auxiliary detector module to the data acquisition system, the data acquisition system performs differentiation processing on each photon counting detector module according to the received scanning information, and then frames the processed CT image data of all the main detector modules and all the auxiliary detector modules, and transmits the processed CT image data to the image reconstruction system through the slip ring so as to reconstruct the CT image of the detected body.
For example, the resolution of the main detector module may be set to be high, the resolution of the auxiliary detector module may be set to be low, data acquired by the main detector module and the auxiliary detector module are not compressed, and all CT image data acquired by the main detector module and the auxiliary detector module are retained.
After the processing, the data volume collected by the auxiliary detector module is greatly reduced, so that the transmitted data volume is reduced.
In the embodiment of the present application, the image reconstruction system 30 may include a high-performance computer and a board card.
Based on the same inventive concept, as shown in fig. 9, an embodiment of the present application further provides a method for processing CT image data, where the method is used for a main processor in a CT imaging system, and the method may include the following steps:
s101, receiving scanning information sent by the console; wherein the scanning information comprises: data acquisition parameters and data processing parameters of each main detector module and each auxiliary detector module; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range, and the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
s102, respectively sending each data acquisition parameter to a corresponding photon counting detector module;
s103, for each photon counting detector module, acquiring CT image data acquired by the photon counting detector module according to received data acquisition parameters, and processing the CT image data according to data processing parameters of the photon counting detector module;
s104, framing the processed CT image data of all the main detector modules and all the auxiliary detector modules to obtain a target data frame;
and S105, transmitting the target data frame to the image reconstruction system through the slip ring so as to reconstruct the CT image of the detected body.
In a possible implementation, the data acquisition parameters include: resolution, number of energy levels, energy levels;
the primary detector module differs from the secondary detector module in at least one of resolution, number of energy levels, or energy level.
In a possible implementation manner, each photon counting detector module includes at least one layer, each layer includes at least one channel, each channel corresponds to one sensor, and data acquired by each channel is divided according to energy level;
the data processing parameters include: compression parameters in the channel direction, compression parameters in the layer direction and energy level extraction parameters;
and at least one of compression parameters in the channel direction, compression parameters in the layer direction and energy level extraction parameters of the main detector module and the auxiliary detector module are different.
In a possible implementation manner, the scanning information further includes: module identification of each of the main detector module and the auxiliary detector module;
step S102, sending each data acquisition parameter to a corresponding photon counting detector module, respectively, including:
for each main detector module, sending data acquisition parameters corresponding to the module identification to the main detector module according to the module identification of the main detector module;
and for each auxiliary detector module, sending the data acquisition parameters corresponding to the module identification to the auxiliary detector module according to the module identification of the auxiliary detector module.
In a possible implementation, the CT image data includes a module identification of the photon counting detector module;
in step S103, processing the CT image data according to the data processing parameters of the photon counting detector module includes:
acquiring the module identification in the CT image data;
searching a data processing parameter corresponding to the module identifier;
and processing the CT image data according to the data processing parameters corresponding to the module identification.
Based on the same inventive concept, referring to fig. 10, an embodiment of the present application provides a method for processing CT image data, where the method is used for a console in a CT imaging system, and the method may include the following steps:
s201, respectively determining a main detector module and an auxiliary detector module in the photon counting detector modules according to the examination part of the examined body and the set scanning visual field; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, and the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range;
s202, configuring data acquisition parameters and data processing parameters of the main detector module and the auxiliary detector module; the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
s203, sending scanning information to the data acquisition system, wherein the scanning information comprises: and data acquisition parameters and data processing parameters of the main detector module and the auxiliary detector module.
In a possible implementation manner, the scanning information further includes: module identification of each of the main detector module and the auxiliary detector module;
before sending scan information to the data acquisition system, the method further comprises:
associating the module identification of the main detector module with the data acquisition parameters and the data processing parameters of the main detector module;
and associating the module identification of the auxiliary detector module with the data acquisition parameters and the data processing parameters of the auxiliary detector module.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (15)
1. A method of processing CT image data for use with a host processor in a CT imaging system, the CT imaging system including a data acquisition system, a console, a slip ring, and an image reconstruction system, the data acquisition system including a plurality of photon counting detector modules and the host processor, the method comprising:
receiving scanning information sent by the console; wherein the scanning information comprises: data acquisition parameters and data processing parameters of each main detector module and each auxiliary detector module; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range, and the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
respectively sending each data acquisition parameter to a corresponding photon counting detector module;
for each photon counting detector module, acquiring CT image data acquired by the photon counting detector module according to received data acquisition parameters, and processing the CT image data according to data processing parameters of the photon counting detector module;
framing the processed CT image data of all the main detector modules and all the auxiliary detector modules to obtain a target data frame;
and transmitting the target data frame to the image reconstruction system through the slip ring so as to reconstruct a CT image of the detected body.
2. The method of claim 1, wherein the data acquisition parameters comprise: resolution, number of energy levels, and energy levels;
the primary detector module and the secondary detector module have different at least one of resolution, number of energy levels, and energy levels.
3. The method of claim 1, wherein each of the photon counting detector modules comprises at least one layer, each of the layers comprises at least one channel, each of the channels corresponds to one sensor, and data collected by each channel is divided according to energy level;
the data processing parameters include: compression parameters in the channel direction, compression parameters in the layer direction and energy level extraction parameters;
and at least one of the compression parameters in the channel direction, the compression parameters in the layer direction and the energy level extraction parameters of the main detector module and the auxiliary detector module are different.
4. The method of claim 1, wherein the scanning information further comprises: module identification of each of the main detector module and the auxiliary detector module;
the sending each data acquisition parameter to the corresponding photon counting detector module respectively comprises:
for each main detector module, sending data acquisition parameters corresponding to the module identification to the main detector module according to the module identification of the main detector module;
and for each auxiliary detector module, sending the data acquisition parameters corresponding to the module identification to the auxiliary detector module according to the module identification of the auxiliary detector module.
5. The method of claim 4, wherein the CT image data includes a module identification of the photon counting detector module;
the processing the CT image data according to the data processing parameters of the photon counting detector module comprises:
acquiring the module identification in the CT image data;
searching a data processing parameter corresponding to the module identifier;
and processing the CT image data according to the data processing parameters corresponding to the module identification.
6. A method of processing CT image data for use in a console in a CT imaging system, the CT imaging system including a data acquisition system, the console, a slip ring, and an image reconstruction system, the data acquisition system including a plurality of photon counting detector modules and a main processor, the method comprising:
respectively determining a main detector module and an auxiliary detector module in the photon counting detector modules according to the examination part of the examined body and the set scanning visual field; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, and the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range;
configuring data acquisition parameters and data processing parameters of each main detector module and each auxiliary detector module; the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
sending scan information to the data acquisition system, the scan information comprising: and data acquisition parameters and data processing parameters of the main detector module and the auxiliary detector module.
7. The method of claim 6, wherein the scanning information further comprises: module identification of each of the primary and secondary detector modules;
before sending scan information to the data acquisition system, the method further comprises:
associating the module identification of the main detector module with the data acquisition parameters and the data processing parameters of the main detector module;
and associating the module identification of the auxiliary detector module with the data acquisition parameters and the data processing parameters of the auxiliary detector module.
8. A data acquisition system comprising a plurality of photon counting detector modules and a main processor;
the photon counting detector module is configured to acquire CT image data according to the received data acquisition parameters and transmit the CT image data to the main processor;
the main processor comprises:
the scanning information receiving module is configured to receive scanning information sent by the console; wherein the scanning information comprises: data acquisition parameters and data processing parameters of each main detector module and each auxiliary detector module; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range, and the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
the acquisition parameter sending module is configured to send each data acquisition parameter to the corresponding photon counting detector module;
the data processing module is configured to acquire CT image data acquired by the photon counting detector module according to the received data acquisition parameters and process the CT image data according to the data processing parameters of the photon counting detector module for each photon counting detector module;
the framing module is configured to frame the processed CT image data of all the main detector modules and all the auxiliary detector modules to obtain a target data frame;
a data transmission module configured to transmit the target data frame to an image reconstruction system through a slip ring to reconstruct a CT image of the subject.
9. The data acquisition system of claim 8, wherein the data acquisition parameters comprise: resolution, number of energy levels, and energy levels;
the primary detector module and the secondary detector module have different at least one of resolution, number of energy levels, and energy levels.
10. The data acquisition system according to claim 8, wherein each of said photon counting detector modules comprises at least one layer, each of said layers comprising at least one channel, each of said channels corresponding to a sensor, data acquired by each channel being divided by energy level;
the data processing parameters include: compression parameters in the channel direction, compression parameters in the layer direction and energy level extraction parameters;
and at least one of the compression parameters in the channel direction, the compression parameters in the layer direction and the energy level extraction parameters of the main detector module and the auxiliary detector module are different.
11. The data acquisition system of claim 8, wherein the scan information further comprises: module identification of each of the main detector module and the auxiliary detector module;
the acquisition parameter sending module is configured to:
for each main detector module, sending data acquisition parameters corresponding to the module identification to the main detector module according to the module identification of the main detector module;
and for each auxiliary detector module, sending the data acquisition parameters corresponding to the module identification to the auxiliary detector module according to the module identification of the auxiliary detector module.
12. The data acquisition system of claim 11 wherein the CT image data includes a module identification of the photon counting detector module;
the data processing module is configured to:
acquiring the module identification in the CT image data;
searching a data processing parameter corresponding to the module identifier;
and processing the CT image data according to the data processing parameters corresponding to the module identification.
13. A console, comprising:
a detector definition module configured to determine a main detector module and an auxiliary detector module of the plurality of photon counting detector modules, respectively, according to an examination site of a subject and a set scanning field of view; the main detector module is a photon counting detector module positioned in a projection region of an examination part of a detected body, and the auxiliary detector module is a photon counting detector module positioned in other regions except the projection region in a scanning visual field range;
the parameter configuration module is configured to configure data acquisition parameters and data processing parameters of the main detector module and the auxiliary detector module; the data acquisition parameters and/or data processing parameters of the main detector module and the auxiliary detector module are different;
a scan information sending module configured to send scan information to a data acquisition system, the scan information comprising: and data acquisition parameters and data processing parameters of the main detector module and the auxiliary detector module.
14. The console of claim 13, wherein the scan information further comprises: module identification of each of the main detector module and the auxiliary detector module;
the console further includes:
an association module configured to associate a module identification of the primary detector module with data acquisition parameters and data processing parameters of the primary detector module prior to sending scan information to the data acquisition system; and associating the module identification of the auxiliary detector module with the data acquisition parameters and the data processing parameters of the auxiliary detector module.
15. A CT imaging system, comprising:
the data acquisition system of any one of claims 8-12, the console, slip ring, and image reconstruction system of any one of claims 13-14;
the control console is connected with the data acquisition system, and the slip ring is connected with the data acquisition system and the image reconstruction system.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201410528D0 (en) * | 2013-06-14 | 2014-07-30 | Nuctech Co Ltd | CT imaging methods and systems |
| CN105105782A (en) * | 2015-09-30 | 2015-12-02 | 上海联影医疗科技有限公司 | CT system and imaging method |
| CN105361900A (en) * | 2014-08-26 | 2016-03-02 | 曹红光 | Static realtime CT (computed tomography) imaging system and imaging control method thereof |
-
2020
- 2020-02-25 CN CN202010117485.8A patent/CN111317495B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201410528D0 (en) * | 2013-06-14 | 2014-07-30 | Nuctech Co Ltd | CT imaging methods and systems |
| CN105361900A (en) * | 2014-08-26 | 2016-03-02 | 曹红光 | Static realtime CT (computed tomography) imaging system and imaging control method thereof |
| WO2016029845A1 (en) * | 2014-08-26 | 2016-03-03 | 曹红光 | Static real-time ct imaging system and imaging control method |
| CN105105782A (en) * | 2015-09-30 | 2015-12-02 | 上海联影医疗科技有限公司 | CT system and imaging method |
Non-Patent Citations (2)
| Title |
|---|
| 戚玉涵 ; 徐佳鹤 ; 张星梅 ; 葛浙东 ; 李早芳 ; 周玉成 ; .基于扇形X射线束的立木CT成像系统.林业科学.2016,(07),全文. * |
| 罗宁 ; 袁翠云 ; 齐宏亮 ; 徐圆 ; 周凌宏 ; .探测器分块排列的CT系统及其图像重建.核电子学与探测技术.2017,(08),全文. * |
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