CN111991016B - Image acquisition parameter acquisition method, device, equipment, system and storage medium - Google Patents
Image acquisition parameter acquisition method, device, equipment, system and storage medium Download PDFInfo
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- CN111991016B CN111991016B CN202010817353.6A CN202010817353A CN111991016B CN 111991016 B CN111991016 B CN 111991016B CN 202010817353 A CN202010817353 A CN 202010817353A CN 111991016 B CN111991016 B CN 111991016B
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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
- A61B6/50—Clinical applications
- A61B6/502—Clinical applications involving diagnosis of breast, i.e. mammography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0033—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room
- A61B5/0035—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room adapted for acquisition of images from more than one imaging mode, e.g. combining MRI and optical tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0033—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room
- A61B5/0037—Performing a preliminary scan, e.g. a prescan for identifying a region of interest
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0048—Detecting, measuring or recording by applying mechanical forces or stimuli
- A61B5/0053—Detecting, measuring or recording by applying mechanical forces or stimuli by applying pressure, e.g. compression, indentation, palpation, grasping, gauging
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0091—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for mammography
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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
- A61B6/48—Diagnostic techniques
- A61B6/482—Diagnostic techniques involving multiple energy imaging
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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
- A61B6/48—Diagnostic techniques
- A61B6/488—Diagnostic techniques involving pre-scan acquisition
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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
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/542—Control of apparatus or devices for radiation diagnosis involving control of exposure
- A61B6/544—Control of apparatus or devices for radiation diagnosis involving control of exposure dependent on patient size
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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
- A61B6/54—Control of apparatus or devices for radiation diagnosis
- A61B6/545—Control of apparatus or devices for radiation diagnosis involving automatic set-up of acquisition parameters
Abstract
The application relates to an image acquisition parameter acquisition method, device, equipment, system and storage medium. The method comprises the following steps: performing pressure test on a breast part of a to-be-detected object according to a compression device, and determining the type of the breast part according to a pressure test result; acquiring an optical image of the breast part, and identifying the optical image to obtain a quantitative parameter of the breast part; the quantitative parameter is used for representing the size of the breast part in a compression state; determining image acquisition parameters of the breast site according to the type of the breast site and the quantification parameters; the image acquisition parameters are used to acquire a medical image of the breast site. By adopting the method, the imaging time can be shortened, and the radiation dose received by the patient can be reduced.
Description
Technical Field
The present application relates to the field of data acquisition technologies, and in particular, to a method, an apparatus, a device, a system, and a storage medium for acquiring image acquisition parameters.
Background
With the continuous development of X-ray technology, currently, when a patient is subjected to a breast examination, most of the X-ray data of the patient is acquired through an X-ray machine, then image reconstruction is performed on the acquired data to obtain a medical image of a breast area of the patient, and then the medical image is analyzed, so that an image analysis result of the patient can be obtained.
In the prior art, when acquiring X-ray data of a patient, a pre-exposure mode is usually adopted to obtain a gray image of a breast area of the patient, and then a gray variation trend of the breast area on the gray image is analyzed to obtain related acquisition parameters for the second data acquisition, so that an X-ray machine can be set by using the acquisition parameters to realize data acquisition and image reconstruction.
However, the above-mentioned techniques suffer from long imaging times, which may result in excessive radiation doses to the patient.
Disclosure of Invention
In view of the above, there is a need to provide an image acquisition parameter acquisition method, an apparatus, a device, a system and a storage medium, which can shorten the imaging time and further reduce the radiation dose received by a patient.
An image acquisition parameter acquisition method, the method comprising:
performing pressure test on the breast part of the object to be detected according to the compression device, and determining the type of the breast part according to the pressure test result;
acquiring an optical image of the breast part, and identifying the optical image to obtain quantitative parameters of the breast part; the quantitative parameter is used for representing the size of the breast part in a compression state;
determining image acquisition parameters of the breast part according to the type and the quantitative parameters of the breast part; the image acquisition parameters are used to acquire a medical image of the breast site.
In one embodiment, the performing a pressure test on the breast portion of the object to be detected according to the compression apparatus and determining the type of the breast portion according to the pressure test result includes:
carrying out pressure test on the breast part according to the compression device to obtain the variation relation between the compression force generated in the pressure test process and the compression thickness of the breast part; the compression thickness of the breast part is the thickness of the breast part under the action of the compression force;
and determining the type of the breast part according to the variation relation between the compression force and the compression thickness.
In one embodiment, the varying relationship comprises varying curvature; the determining the type of the breast part according to the variation relationship between the compression force and the compression thickness comprises the following steps:
comparing the variable curvature with a preset curvature threshold;
if the changing curvature is larger than the curvature threshold, determining that the type of the breast part is fat type;
otherwise, the type of the breast site is determined to be dense.
In one embodiment, the determining the image acquisition parameters of the breast region according to the type of the breast region and the quantification parameters includes:
determining the radiation field corresponding to the breast part according to the quantitative parameters;
and determining the image acquisition parameters of the breast part according to the type of the breast part and the radiation field corresponding to the breast part.
In one embodiment, the quantitative parameter of the breast site includes a volume of the breast site; the above-mentioned identification processing of the optical image to obtain the quantitative parameter of the breast part includes:
performing identification processing on the optical image to obtain the position of each point on the contour of the breast part;
performing mathematical operation processing on the position of each point on the contour to obtain the volume of the breast part; alternatively, the first and second electrodes may be,
the position of each point on the contour is mathematically processed to obtain the projected area of the breast portion on the compression device.
In one embodiment, the image acquisition parameters include a first image acquisition parameter and a second image acquisition parameter; the above-mentioned determining the image acquisition parameters of the breast region according to the type and the quantitative parameters of the breast region includes:
obtaining a radiation field corresponding to the breast part according to the volume or the projection area of the breast part;
determining a radiation field corresponding to the breast part as a first image acquisition parameter;
the second image acquisition parameter is determined based on the type of the breast site.
In one embodiment, the determining the second image acquisition parameter according to the type of the breast site includes:
acquiring the actual compression thickness of the breast part under a preset condition; the preset condition is related to the bearing degree of the object to be detected to the compression force;
a second image acquisition parameter is determined based on the type of breast site and the actual compression thickness.
In one embodiment, the determining the second image acquisition parameter according to the type of the breast site and the actual compression thickness includes:
obtaining a second image acquisition parameter corresponding to the type of the breast part and the actual compression thickness in a preset mapping table according to the type of the breast part and the actual compression thickness;
the mapping table comprises types and compression thicknesses of a plurality of groups of parts, and second image acquisition parameters corresponding to the types and compression thicknesses of each group of parts; the second image acquisition parameter is used to characterize the power of the emitter and the filtering mode of the beam limiter.
An image acquisition parameter acquisition apparatus, the apparatus comprising:
the type determining module is used for carrying out pressure test on the breast part of the object to be detected according to the compression device and determining the type of the breast part according to the pressure test result;
the quantitative parameter determining module is used for acquiring an optical image of the breast part and identifying the optical image to obtain quantitative parameters of the breast part; the quantitative parameter is used for representing the size of the breast part in a compression state;
the acquisition parameter determining module is used for determining image acquisition parameters of the breast part according to the type and the quantitative parameters of the breast part; the image acquisition parameters are used to acquire a medical image of the breast site.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
performing pressure test on the breast part of the object to be detected according to the compression device, and determining the type of the breast part according to the pressure test result;
acquiring an optical image of the breast part, and identifying the optical image to obtain quantitative parameters of the breast part; the quantitative parameter is used for representing the size of the breast part in a compression state;
determining image acquisition parameters of the breast part according to the type and the quantitative parameters of the breast part; the image acquisition parameters are used to acquire a medical image of the breast site.
A medical imaging system comprises an emitter, a beam limiter, a detector, an optical imaging device, a compression device and the computer equipment;
the optical imaging device is used for acquiring an optical image of a breast part of an object to be detected;
the compression device is used for carrying out pressure test on the breast part;
the emitter and beam limiter described above are used to acquire medical images of the breast site.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
performing pressure test on the breast part of the object to be detected according to the compression device, and determining the type of the breast part according to the pressure test result;
acquiring an optical image of the breast part, and identifying the optical image to obtain quantitative parameters of the breast part; the quantitative parameter is used for representing the size of the breast part in a compression state;
determining image acquisition parameters of the breast part according to the type and the quantitative parameters of the breast part; the image acquisition parameters are used for acquiring a medical image of the breast site.
According to the image acquisition parameter acquisition method, the device, the equipment, the system and the storage medium, the breast part of the object to be detected is subjected to pressure test, the type of the breast part is determined according to the pressure test result, meanwhile, the quantitative parameter capable of representing the size of the breast part is obtained through the optical image of the breast part, and the image acquisition parameter for acquiring the medical image of the breast part is determined according to the type of the breast part and the quantitative parameter. In the method, the corresponding medical image acquisition parameters can be determined according to the type and the quantitative parameters of the breast part, so that when the medical image of the breast part is obtained, the corresponding medical image can be obtained only by exposing the breast part once according to the determined medical image acquisition parameters.
Drawings
FIG. 1 is a diagram of an application environment of a method for acquiring image acquisition parameters in one embodiment;
FIG. 2 is a schematic flow chart diagram illustrating a method for acquiring image acquisition parameters according to one embodiment;
FIG. 3 is a schematic flow chart of a method for acquiring image acquisition parameters in another embodiment;
FIG. 4 is a schematic flow chart of a method for acquiring image acquisition parameters in another embodiment;
FIG. 5 is a schematic flow chart of a method for acquiring image acquisition parameters in another embodiment;
FIG. 6 is a block diagram of an embodiment of an apparatus for acquiring image acquisition parameters;
FIG. 7 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The method for acquiring image acquisition parameters provided by the embodiment of the present application can be applied to the medical imaging system 100 shown in fig. 1, where the medical imaging system 100 includes an emitter 101, a beam limiter 102, an optical imaging device 103, a compression device 104, a computer device 105, and a detector 106.
In the present embodiment, the medical imaging system 100 is embodied as a breast machine. It is understood that in other embodiments, the medical imaging system 100 may be other imaging devices such as a CT machine.
A transmitter 101 and a beam limiter 102 for acquiring medical images of the breast region; the emitter 101 may be an array X-ray source or may employ a conventional single emitter source. The array X-ray source can adopt a linear array X-ray source and/or an area array X-ray source. Any one of the X-ray sources or single emission sources in the array of X-ray sources may be either a field emission X-ray source or a hot cathode X-ray source. The beam limiter 102 is typically arranged in front of the output window of the emitter 101.
The optical imaging device 103 is used for acquiring an optical image of a breast part of the object to be detected; for example an optical camera or the like. The optical imaging device 103 may transmit the acquired optical image to the computer device 105 for processing.
The compression device 104 is used for performing pressure test on the breast part and performing data acquisition after compressing the breast part to a certain thickness when performing data acquisition on the breast part; the compression apparatus 104 may include a compression paddle for compressing the breast site and a drive member for driving the compression paddle to perform a pressure test on the breast site; wherein the driving means may be controlled by the computer device 105.
The computer device 105 may be a server, and may be implemented as a stand-alone server or as a server cluster of multiple servers. Of course, the terminal may also be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, portable wearable devices, and the like.
A detector 106, the detector 106 is used for detecting (acquiring) projection data of the X-ray emitted by the emitter 101 after passing through the breast portion, the breast portion is located between the detector 106 and the compression apparatus 104, and the projection data is transmitted to the computer device 105 for processing, the detector 106 can be a flat panel detector, but it can also be other types of detectors.
It should be noted that, in the following embodiments of the present application, the execution subject may be a computer device or a medical imaging system, and the computer device is taken as an example for description below.
In one embodiment, an image acquisition parameter obtaining method is provided, and the embodiment relates to a specific process of obtaining the type and the quantitative parameters of the breast part and further obtaining the medical image acquisition parameters of the breast part. As shown in fig. 2, the method comprises the steps of:
s202, performing pressure test on the breast part of the object to be detected according to the compression device, and determining the type of the breast part according to the pressure test result.
Here, the breast part may be a bilateral breast or a unilateral breast, and in the case of performing the stress test, the present embodiment is mainly described with respect to the unilateral breast, and the other breast may perform the same operation after the imaging of the unilateral breast is completed.
The compression apparatus includes a compression paddle and a drive member that is connectable with the compression paddle and a computer device. During a compression test, the breast site may be placed intermediate the compression paddle and the probe. The computer equipment can control the movement of the driving part by the way that software outputs an electric signal and the like, the driving part applies pressure to the compression plate to drive the compression plate to move, the compression plate can move up and down, or move left and right, or move front and back, in short, the thickness of the breast part positioned between the compression plate and the detector can be changed by driving the compression plate to move through the driving part. Meanwhile, the stress condition of the compression plate in the movement process of the compression plate can be known, so that the stress condition of the compression plate and the thickness change condition of the breast part can be analyzed, and the type of the breast part can be obtained. Alternatively, the type of the breast area may include fat type, dense type, and other types, which may be set according to actual conditions.
S204, acquiring an optical image of the breast part, and identifying the optical image to obtain a quantitative parameter of the breast part; the quantitative parameter is used to characterize the size of the breast site under compression.
Here, the timing of acquiring the optical image of the breast part in this step may be after performing the stress test, that is, after performing S202. Whether the pressure test is completed or not can be characterized by a predetermined time period, for example, the pressure is continuously applied to the breast part by the compression plate within the predetermined time period, and the pressure test is considered to be completed when the predetermined time period is reached. Alternatively, whether the compression test is complete may also be characterized by the compression thickness of the breast site, e.g., when the thickness of the breast site is compressed to a certain thickness as the pressure is continuously applied to the breast site by the compression paddle, the compression test may be considered complete. Of course, other characterization methods are also possible, and in any case, the result of whether the pressure test is completed can be obtained.
Of course, in this step, the optical image of the breast portion may be acquired before S202, that is, the optical image of the breast portion in the compressed state may be acquired when the breast portion is compressed in advance to be in the compressed state and the breast portion is compressed to a certain thickness.
In summary, the breast area is compressed to a relatively thin thickness both after the completion of the above-mentioned compression test and before the compression test, and the breast area is thin and uniform, so that the overlapped soft tissues in the structure of the breast area can be easily separated, thereby obtaining a high-quality medical image or optical image of the breast area.
Specifically, when the breast portion is in the compressed state, the optical imaging device may be used to capture an image of the breast portion to obtain an optical image of the breast portion, and then the optical imaging device may transmit the optical image to the computer device, so that the computer device may obtain the optical image of the breast portion.
Then, the computer device can identify the obtained optical image through an image identification algorithm, identify the breast part therein, obtain the outline, the shape and the like of the breast part, and further obtain the parameters of the size, the volume, the area and the like of the breast part, namely the quantitative parameters of the breast part, through analyzing and calculating the outline and the shape of the breast part.
Wherein, the image recognition algorithm can be a geometric feature-based algorithm, a template-based algorithm, a model-based algorithm and the like; for example, the model-based algorithm may be a recognition algorithm based on a neural network model.
Taking a model-based algorithm as an example, the model may be a neural network model, and then the neural network model may be trained prior to recognition using the neural network model.
The training process may include: acquiring a training image set, wherein each training image in the training image set is an optical image of a breast part, and each training image comprises the labeling position information of the breast; then, each training image in the training image set can be used as the input of the initial neural network model, the labeling position information of the breast corresponding to each training image can be used as the reference output of the initial neural network model, and the initial neural network model is trained to obtain the trained neural network model.
After the neural network model is trained, the optical image of the tested breast part can be input into the neural network model, and the position information of the breast on the tested optical image can be obtained, so that the information of the contour, the shape and the like of the breast can be obtained.
S206, determining image acquisition parameters of the breast part according to the type and the quantitative parameters of the breast part; the image acquisition parameters are used to acquire a medical image of the breast site.
In this step, the image acquisition parameters may be parameters that are required to be set for the components in the imaging system when acquiring the medical image, and may include, for example, setting parameters of the emitter, setting parameters of the beam limiter, and the like.
After the types of the breast parts and the related quantitative parameters are obtained, the image acquisition parameters of the breast parts can be obtained through table lookup, calculation and the like. The setting parameters of the transmitter and the setting parameters of the beam limiter can be included, so that the transmitter can be set according to the setting parameters of the transmitter, and the beam limiter can be set according to the setting parameters of the beam limiter.
After the emitter, the beam limiter and the like set the parameters, the emitter, the beam limiter and the like set the parameters can be adopted to emit X-rays to the breast part, data acquisition is carried out through the detector, and the medical image of the breast part can be obtained through image reconstruction of the acquired data. The medical image here may be an X-ray image.
In the image acquisition parameter acquiring method, the pressure test is carried out on the breast part of the object to be detected, the type of the breast part is determined according to the pressure test result, meanwhile, the quantitative parameter capable of representing the size of the breast part is obtained through the optical image of the breast part, and the image acquisition parameter for acquiring the medical image of the breast part is determined according to the type of the breast part and the quantitative parameter. In the method, because the corresponding medical image acquisition parameter can be determined according to the type and the quantitative parameter of the breast part, when the medical image of the breast part is obtained, the corresponding medical image can be obtained only by exposing the breast part once according to the determined medical image acquisition parameter.
In another embodiment, another image acquisition parameter acquisition method is provided, which relates to a specific procedure of how to perform a stress test on a breast site to determine the type of the breast site based on the test results. On the basis of the above embodiment, as shown in fig. 3, the above S202 may include the following steps:
s302, carrying out pressure test on the breast part according to the compression device to obtain a variation relation between compression force generated in the pressure test process and compression thickness of the breast part; the compression thickness of the breast portion is a thickness of the breast portion when the compression force is applied.
In this step, during the pressure testing process of the breast part, when the compression plate compresses the breast part, a compression force is generated, different compression forces are adopted to compress the breast part, and the thickness of the breast part is also changed.
In the process of pressure testing, different pressures are adopted to compress the breast part, so that the thickness of the compressed breast part under different compression forces can be obtained and recorded as the compression thickness, namely the variation trend of the compression thickness under different compression forces can be obtained and recorded as the variation relation between the compression force and the compression thickness.
Of course, the relationship between the pressing force and the pressing thickness may be represented by a curve, for example, the horizontal axis of the coordinate axis is the pressing thickness, the vertical axis is the pressing force, the pressing thickness corresponding to different pressing forces is filled into the corresponding position of the coordinate axis, and the filled points are connected, or linearly fitted, or curve fitted, so as to obtain a variation curve between the pressing force and the pressing thickness.
S304, determining the type of the breast part according to the variation relation between the compression force and the compression thickness.
In this step, after obtaining the variation curve between the compression force and the compression thickness, that is, after obtaining the variation relationship, optionally, the variation relationship includes a variation curvature, and then the variation curvature may be compared with a preset curvature threshold; if the variable curvature is larger than the curvature threshold value, determining that the type of the breast part is fat type; otherwise, the type of the breast site is determined to be dense.
That is, after obtaining a curve of a change between the compression force and the compression thickness of the breast portion, a curvature of any point on the curve may be calculated, and the calculated curvature of one point may be compared with a curvature threshold, and when the calculated curvature is greater than the curvature threshold, it may be considered that the compression force and the compression thickness of the breast portion change faster, and then the type of the breast portion may be considered as fat type (fat type may be understood herein as a breast portion having more fat, and having a thinner thickness under the same compression force).
Of course, if the calculated curvature is not greater than the curvature threshold, i.e., not greater than the curvature threshold, then the compression force and compression thickness of the breast region may be considered to change slowly, and then the type of the breast region may be considered to be dense (dense is understood herein to mean that the breast region has less fat and, likewise, a greater thickness under the same compression force).
It should be noted that the classification types of fat type and dense type are only an example, and there may be more classification types, for example, how much the curvature is larger than the curvature threshold.
In the image acquisition parameter acquiring method provided by this embodiment, the variation relationship between the compression force and the compression thickness applied to the breast portion in the pressure testing process is obtained, and the type of the breast portion is obtained through the variation relationship. In the method, the type of the breast part can be determined through the variation relation between the compression force and the compression thickness, the determination method is simple, and the obtained type result is more accurate.
In another embodiment, another image acquisition parameter acquisition method is provided, which relates to a specific procedure of how to obtain the acquisition parameters of the breast region according to the type and quantification parameters of the breast region. On the basis of the above embodiment, the above S206 may include the following step one and step two:
step one, determining a radiation field corresponding to the breast part according to the quantitative parameters.
And step two, determining image acquisition parameters of the breast part according to the type of the breast part and the radiation field corresponding to the breast part.
In this embodiment, the quantitative parameter may include parameters such as size, volume, and area of the breast portion, and after obtaining the quantitative parameter, the size, volume, or area of the breast portion may be directly used as the radiation field of the breast portion, i.e. the size of the range of the breast portion that is radiated.
Then, the beam limiter can be set by taking the radiation field of the breast part as the setting parameter of the beam limiter. Meanwhile, the image acquisition parameters of the breast part can be obtained by looking up a table, calculating and the like. The setting parameters of the transmitter and the setting parameters of the beam limiter can be included, so that the transmitter can be set according to the setting parameters of the transmitter, and the beam limiter can be set according to the setting parameters of the beam limiter.
The image acquisition parameter acquiring method provided by this embodiment may obtain the radiation field of the breast portion by quantifying the size, area, volume, and other parameters of the breast portion in the parameters, and determine the image acquisition parameters of the breast portion according to the type of the breast portion and the radiation field. By the method of the embodiment, the radiation field and the image acquisition parameters of the breast part can be obtained relatively simply and accurately, so that the object to be detected can be prevented from receiving unnecessary radiation as far as possible in the medical imaging process.
In another embodiment, another image acquisition parameter obtaining method is provided, and this embodiment relates to the above-mentioned quantification parameter of the breast portion including the volume of the breast portion, and how to identify the optical image to obtain the volume of the breast portion. On the basis of the above embodiment, as shown in fig. 4, the step S204 may include the following steps:
s402, the optical image is identified to obtain the position of each point on the outline of the breast part.
S404, performing mathematical operation processing on the position of each point on the contour to obtain the volume of the breast part; alternatively, the position of each point on the contour is mathematically processed to obtain the projected area of the breast portion on the compression device.
In this embodiment, the image recognition algorithm described in S204 above may be adopted in the recognition process, which is not described herein.
It should be noted that the optical image is also acquired when the breast portion is in a thin and uniform state after the stress test is completed.
Specifically, the contour of the breast portion can be recognized by recognizing the obtained optical image through an image recognition algorithm, and meanwhile, the position information of each point on the contour of the breast portion can be obtained.
After obtaining the position information of each point on the contour of the breast portion, for example, the length and width of the breast portion may be calculated from the lowest edge of the contour in the horizontal direction, the height of the breast portion may be calculated with the vertical direction as the height direction of the breast portion, and the volume of the breast portion may be obtained by multiplying the calculated length, width, and height.
In addition, the projected area of the breast site on the compression apparatus refers to the projected area of the breast site on the compression plate in the compression apparatus. Generally, the compression plate is parallel to the vertical direction of the human body when the breast part is compressed, that is, the projected area is the projected area of the breast part in the vertical direction.
Then after the volume of the breast portion is obtained, since the volume of the breast portion is obtained by multiplying the calculated length, width and height, when the projected area in the vertical direction is calculated here, the calculated area, i.e., the projected area here, can be obtained by multiplying the width and height in the volume calculation.
It should be noted that the projection area may be calculated when the breast portion is in a compressed state and the breast portion is in a thin and uniform state.
In the image acquisition parameter acquiring method provided by this embodiment, the volume of the breast portion or the projection area of the breast portion on the compression apparatus may be obtained by calculating the position of each point on the contour of the breast portion obtained by identifying the optical image. In the method, the volume or the projection area of the breast part is calculated according to the contour position of the breast part, so that the calculated volume or the projection area of the breast part is more consistent with the actual situation and more accurate.
In another embodiment, another method for acquiring image acquisition parameters is provided, where the image acquisition parameters include a first image acquisition parameter and a second image acquisition parameter; one possible embodiment of how to derive medical image acquisition parameters for the breast site is based on the type of breast site and the quantification parameters. On the basis of the above embodiment, as shown in fig. 5, the above S206 may include the following steps:
s502, according to the volume or the projection area of the breast part, the radiation field corresponding to the breast part is obtained.
S504, determining the radiation field corresponding to the breast part as a first image acquisition parameter.
In S502 to S504, after the volume of the breast portion or the projection area of the breast portion on the compression plate is obtained, taking the projection area as an example, the projection area can be used as the size of the imaging area when the medical image of the breast portion is imaged, that is, the radiation field of the X-ray received by the breast portion when the medical image of the breast portion is imaged. The radiation field is usually expressed according to the size of the opening of the beam limiter, and the projection area is the size of the opening of the beam limiter. Illustratively, 18 × 25cm, etc.
S506, determining second image acquisition parameters according to the type of the breast part.
In this step, optionally, the following steps A1-A2 may be employed to obtain the second image acquisition parameter:
a1, acquiring the actual compression thickness of a breast part under a preset condition; the preset condition is related to the bearing degree of the object to be detected to the compression force.
And A2, determining a second image acquisition parameter according to the type of the breast part and the actual compression thickness.
When the breast part of the object to be detected is actually subjected to medical image imaging, the compression thickness of the breast part at the moment can be acquired when the object to be detected is in a critical state of being resistant to the compression force in consideration of the tolerance degree of the individual object to be detected to the compression force, and the compression thickness at the moment is taken as the compression thickness in the actual medical imaging, namely the actual compression thickness.
After the actual compression thickness of the breast part and the type of the breast part are obtained, optionally, a second image acquisition parameter corresponding to the type of the breast part and the actual compression thickness can be obtained in a preset mapping table according to the type of the breast part and the actual compression thickness; the mapping table comprises types and compression thicknesses of a plurality of groups of parts, and second image acquisition parameters corresponding to the types and compression thicknesses of each group of parts; the second image acquisition parameter is used to characterize the power of the emitter and the filtering mode of the beam limiter.
That is, a mapping table may be preset, which includes the correspondence between different types (i.e., types of breast regions) and different compression thicknesses and emitter powers and the filtering mode of the beam limiter. The power of the transmitter can be represented by current and voltage, for example, KV and mas.
For example, the mapping table may be seen in table 1 below:
then, after the actual compression thickness and the type of the breast portion are obtained, the power of the emitter and the filtering manner of the beam limiter corresponding to the actual compression thickness and the type of the breast portion can be obtained through a table look-up method.
The power parameters of the transmitter obtained by the table lookup can then be used to set the voltage and current of the transmitter, and the filtering obtained by the table lookup can also be used to set the filtering of the beam limiter. After the emitter and the beam limiter are arranged, the emitter and the beam limiter with the set parameters can be adopted to emit X rays to the breast part, data acquisition is carried out, and the acquired data is subjected to image reconstruction, so that the medical image of the breast part can be obtained.
The method for acquiring the image acquisition parameters provided by the embodiment can obtain the radiation field of the breast part through the volume of the breast part or the projection area on the compression device, and simultaneously obtain the power of the emitter and the filtering mode of the beam limiter through the type and the actual compression thickness of the breast part. According to the method, the radiation field of the breast part is obtained through the specific volume or the projection area, so that the obtained radiation field is accurate, and the object to be detected can be prevented from receiving unnecessary radiation as far as possible in the medical imaging process. In addition, the power of the emitter and the filtering mode of the beam limiter are determined according to the type and the actual compression thickness of the breast part, so that the imaging parameters can be further refined, and the radiation dose of the object to be detected can be further reduced.
It should be understood that although the various steps in the flow charts of fig. 2-5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-5 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 6, there is provided an image acquisition parameter acquisition apparatus, including: a type determination module 10, a quantization parameter determination module 11 and an acquisition parameter determination module 12, wherein:
the type determining module 10 is used for performing pressure test on the breast part of the object to be detected according to the compression device and determining the type of the breast part according to the pressure test result;
the quantitative parameter determining module 11 is configured to acquire an optical image of the breast portion, and perform recognition processing on the optical image to obtain a quantitative parameter of the breast portion; the quantitative parameter is used for representing the size of the breast part in a compression state;
an acquisition parameter determining module 12 for determining an image acquisition parameter of the breast part according to the type of the breast part and the quantization parameter; the image acquisition parameters are used to acquire a medical image of the breast site.
For specific limitations of the image acquisition parameter acquiring device, reference may be made to the above limitations of the image acquisition parameter acquiring method, which are not described herein again.
In another embodiment, another image acquisition parameter obtaining apparatus is provided, and on the basis of the above embodiment, the type determining module 10 may include a variation relation determining unit and a type determining unit, wherein:
the change relation determining unit is used for carrying out pressure test on the breast part according to the compression device to obtain the change relation between the compression force generated in the pressure test process and the compression thickness of the breast part; the compression thickness of the breast part is the thickness of the breast part under the action of the compression force;
and the type determining unit is used for determining the type of the breast part according to the variation relation between the compression force and the compression thickness.
Optionally, the varying relation includes varying curvature; the type determining unit may include a comparing subunit and a type determining subunit, wherein:
the comparison subunit is used for comparing the variable curvature with a preset curvature threshold;
a determining subunit, configured to determine that the type of the breast part is fat type if the varying curvature is larger than the curvature threshold; in the case where the varying curvature is not greater than the curvature threshold, the type of the breast portion is determined to be dense.
In another embodiment, another image acquisition parameter acquiring apparatus is provided, and on the basis of the above embodiment, the above acquisition parameter determining module 12 may include a first radiation field determining unit and an acquisition parameter determining unit, wherein:
the first radiation field determining unit is used for determining the radiation field corresponding to the breast part according to the quantitative parameters;
and the acquisition parameter determining unit is used for determining the image acquisition parameters of the breast part according to the type of the breast part and the radiation field corresponding to the breast part.
In another embodiment, another image acquisition parameter obtaining apparatus is provided, on the basis of the above embodiment, the quantification parameter of the breast part includes a volume of the breast part, and the quantification parameter determining module 11 may include an identifying unit and a volume calculating unit, wherein:
the recognition unit is used for carrying out recognition processing on the optical image to obtain the position of each point on the outline of the breast part;
the volume area calculation unit is used for performing mathematical operation processing on the position of each point on the contour to obtain the volume of the breast part; alternatively, the position of each point on the contour is mathematically processed to obtain the projected area of the breast portion on the compression device.
In another embodiment, another image acquisition parameter obtaining apparatus is provided, on the basis of the above embodiment, the image acquisition parameters include a first image acquisition parameter and a second image acquisition parameter, and the acquisition parameter determining module 12 may include a second radiation field determination calculating unit, a first acquisition parameter determining unit, and a second acquisition parameter determining unit, where:
the second radiation field determining unit is used for obtaining a radiation field corresponding to the breast part according to the volume or the projection area of the breast part;
a first acquisition parameter determining unit for determining a radiation field corresponding to the breast part as a first image acquisition parameter;
a second acquisition parameter determination unit for determining second image acquisition parameters depending on the type of the breast site.
Optionally, the second acquisition parameter determining unit may include a compression thickness acquiring subunit and an acquisition parameter determining subunit, where:
a compression thickness acquiring subunit for acquiring an actual compression thickness of the breast part under a preset condition; the preset condition is related to the bearing degree of the object to be detected to the compression force;
an acquisition parameter determining subunit for determining a second image acquisition parameter according to the type of the breast site and the actual compression thickness.
Optionally, the acquisition parameter determining subunit is further configured to obtain, according to the type and the actual compression thickness of the breast part, a second image acquisition parameter corresponding to the type and the actual compression thickness of the breast part in a preset mapping table; the mapping table comprises types and compression thicknesses of a plurality of groups of parts, and second image acquisition parameters corresponding to the types and compression thicknesses of each group of parts; the second image acquisition parameter is used to characterize the power of the emitter and the filtering mode of the beam limiter.
For specific limitations of the image acquisition parameter acquiring device, reference may be made to the above limitations of the image acquisition parameter acquiring method, which are not described herein again. All modules in the image acquisition parameter acquisition device can be completely or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, and taking the computer device as a terminal as an example, the internal structure diagram thereof can be as shown in fig. 7. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used for communicating with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement an image acquisition parameter acquisition method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
performing pressure test on the breast part of the object to be detected according to the compression device, and determining the type of the breast part according to the pressure test result;
acquiring an optical image of the breast part, and identifying the optical image to obtain quantitative parameters of the breast part; the quantitative parameter is used for representing the size of the breast part in a compression state;
determining image acquisition parameters of the breast part according to the type and the quantitative parameters of the breast part; the image acquisition parameters are used to acquire a medical image of the breast site.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
carrying out pressure test on the breast part according to the compression device to obtain the variation relation between the compression force generated in the pressure test process and the compression thickness of the breast part; the compression thickness of the breast part is the thickness of the breast part under the action of the compression force; and determining the type of the breast part according to the variation relation between the compression force and the compression thickness.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
comparing the variable curvature with a preset curvature threshold; if the variable curvature is larger than the curvature threshold value, determining that the type of the breast part is fat type; otherwise, the type of the breast site is determined to be dense.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
determining a radiation field corresponding to the breast part according to the quantitative parameters; and determining the image acquisition parameters of the breast part according to the type of the breast part and the radiation field corresponding to the breast part.
In one embodiment, the processor when executing the computer program further performs the steps of:
carrying out recognition processing on the optical image to obtain the position of each point on the contour of the breast part; performing mathematical operation processing on the position of each point on the contour to obtain the volume of the breast part; alternatively, the position of each point on the contour is mathematically processed to obtain the projected area of the breast portion on the compression device.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
obtaining a radiation field corresponding to the breast part according to the volume or the projection area of the breast part; determining a radiation field corresponding to the breast part as a first image acquisition parameter; the second image acquisition parameter is determined based on the type of the breast site.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
acquiring the actual compression thickness of the breast part under a preset condition; the preset condition is related to the bearing degree of the object to be detected to the compression force; a second image acquisition parameter is determined based on the type of breast site and the actual compression thickness.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
according to the type and the actual compression thickness of the breast part, obtaining a second image acquisition parameter corresponding to the type and the actual compression thickness of the breast part in a preset mapping table; the mapping table comprises types and compression thicknesses of a plurality of groups of parts, and second image acquisition parameters corresponding to the types and compression thicknesses of each group of parts; the second image acquisition parameter is used to characterize the power of the emitter and the filtering mode of the beam limiter.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
performing pressure test on the breast part of the object to be detected according to the compression device, and determining the type of the breast part according to the pressure test result;
acquiring an optical image of the breast part, and identifying the optical image to obtain quantitative parameters of the breast part; the quantitative parameter is used for representing the size of the breast part in a compression state;
determining image acquisition parameters of the breast part according to the type and the quantitative parameters of the breast part; the image acquisition parameters are used to acquire a medical image of the breast site.
In one embodiment, the computer program when executed by the processor further performs the steps of:
carrying out pressure test on the breast part according to the compression device to obtain the variation relation between the compression force generated in the pressure test process and the compression thickness of the breast part; the compression thickness of the breast part is the thickness of the breast part under the action of the compression force; and determining the type of the breast part according to the variation relation between the compression force and the compression thickness.
In one embodiment, the computer program when executed by the processor further performs the steps of:
comparing the variable curvature with a preset curvature threshold; if the variable curvature is larger than the curvature threshold value, determining that the type of the breast part is fat type; otherwise, the type of the breast site is determined to be dense.
In one embodiment, the computer program when executed by the processor further performs the steps of:
determining the radiation field corresponding to the breast part according to the quantitative parameters; and determining the image acquisition parameters of the breast part according to the type of the breast part and the radiation field corresponding to the breast part.
In one embodiment, the computer program when executed by the processor further performs the steps of:
carrying out recognition processing on the optical image to obtain the position of each point on the contour of the breast part; performing mathematical operation processing on the position of each point on the contour to obtain the volume of the breast part; alternatively, the position of each point on the contour is mathematically processed to obtain the projected area of the breast portion on the compression device.
In one embodiment, the computer program when executed by the processor further performs the steps of:
obtaining a radiation field corresponding to the breast part according to the volume or the projection area of the breast part; determining a radiation field corresponding to the breast part as a first image acquisition parameter; the second image acquisition parameter is determined based on the type of the breast site.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring the actual compression thickness of the breast part under a preset condition; the preset condition is related to the bearing degree of the object to be detected to the compression force; a second image acquisition parameter is determined based on the type of breast site and the actual compression thickness.
In one embodiment, the computer program when executed by the processor further performs the steps of:
obtaining a second image acquisition parameter corresponding to the type of the breast part and the actual compression thickness in a preset mapping table according to the type of the breast part and the actual compression thickness; the mapping table comprises types and compression thicknesses of a plurality of groups of parts, and second image acquisition parameters corresponding to the types and compression thicknesses of each group of parts; the second image acquisition parameter is used to characterize the power of the emitter and the filtering mode of the beam limiter.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. An image acquisition parameter acquisition method, characterized in that the method comprises:
performing pressure test on a breast part of a to-be-detected object according to a compression device, and determining the type of the breast part according to a pressure test result;
when the breast part is in a compression state compressed by the compression device and compressed to a certain thickness, acquiring an optical image of the breast part, and identifying the optical image to obtain a quantitative parameter of the breast part, wherein the quantitative parameter comprises the volume or the projection area of the breast part;
obtaining a radiation field corresponding to the breast part according to the volume or the projection area of the breast part, and determining the radiation field corresponding to the breast part as a first image acquisition parameter;
acquiring the actual compression thickness of the breast part, and determining a second image acquisition parameter according to the type of the breast part and the actual compression thickness, wherein the actual compression thickness is the compression thickness of the object to be detected in a critical state of resisting compression force; the first and second image acquisition parameters are used for acquiring a medical image of the breast site.
2. The method of claim 1, wherein the performing a pressure test on a breast site of the subject according to the compression apparatus and determining the type of the breast site according to the pressure test result comprises:
carrying out pressure test on the breast part according to the compression device to obtain the variation relation between the compression force generated in the pressure test process and the compression thickness of the breast part;
and determining the type of the breast part according to the variation relation between the compression force and the compression thickness.
3. The method according to any one of claims 1-2, wherein the performing the identification process on the optical image to obtain the quantitative parameter of the breast part comprises:
performing recognition processing on the optical image to obtain the position of each point on the contour of the breast part;
performing mathematical operation processing on the position of each point on the contour to obtain the volume of the breast part; alternatively, the first and second electrodes may be,
and performing mathematical operation on the position of each point on the contour to obtain the projection area of the breast part on a compression plate in the compression device.
4. The method according to any of claims 1-2, wherein the first image acquisition parameter is used to characterize an opening size of the beam limiter and the second image acquisition parameter is used to characterize a power of the emitter and a filtering manner of the beam limiter.
5. The method of claim 3, wherein the compression paddle is parallel to a vertical direction of the person's body, and the projected area is calculated from a width of the breast member in a horizontal direction of the person's body and a height of the breast member in the vertical direction of the person's body.
6. An image acquisition parameter acquisition apparatus, characterized in that the apparatus comprises:
the type determining module is used for carrying out pressure test on the breast part of the object to be detected according to the compression device and determining the type of the breast part according to the pressure test result;
the quantitative parameter determining module is used for acquiring an optical image of the breast part when the breast part is in a compression state compressed by the compression device and compressed to a certain thickness, and identifying the optical image to obtain quantitative parameters of the breast part, wherein the quantitative parameters comprise the volume or the projection area of the breast part;
the acquisition parameter determining module is used for obtaining a radiation field corresponding to the breast part according to the volume or the projection area of the breast part and determining the radiation field corresponding to the breast part as a first image acquisition parameter; acquiring the actual compression thickness of the breast part, and determining a second image acquisition parameter according to the type of the breast part and the actual compression thickness, wherein the actual compression thickness is the compression thickness of the object to be detected in a critical state of resisting compression force; the first and second image acquisition parameters are used for acquiring a medical image of the breast site.
7. The apparatus of claim 6, wherein the type determination module comprises a variance relationship determination unit and a type determination unit, wherein:
a variation relation determining unit for performing a pressure test on the breast portion according to the compression device to obtain a variation relation between a compression force generated in the pressure test process and a compression thickness of the breast portion;
and the type determining unit is used for determining the type of the breast part according to the variation relation between the compression force and the compression thickness.
8. The apparatus according to claim 6 or 7, wherein the quantification parameter determination module comprises an identification unit and a volume calculation unit, wherein:
the recognition unit is used for recognizing the optical image to obtain the position of each point on the contour of the breast part;
the volume area calculation unit is used for performing mathematical operation processing on the position of each point on the contour to obtain the volume of the breast part; alternatively, the projection area of the breast portion on the compression plate of the compression apparatus is obtained by performing mathematical operation on the position of each point on the contour.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 5.
10. A medical imaging system, characterized in that it comprises an emitter, a beam limiter, a detector, an optical imaging device, a compression device, the computer arrangement of claim 9;
the optical imaging device is used for acquiring an optical image of a breast part of the object to be detected;
the compression device is used for carrying out pressure test on the breast part;
the emitter and beam limiter are used for acquiring medical images of the breast part.
11. A 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 of any one of claims 1 to 5.
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