Medical data acquisition method, apparatus and ct heart scan control method

Abstract

The application relates to a medical data acquisition method and device and a CT heart scan control method, which are applied to a medical detection system comprising a first detection component and a second detection component, the first detection component comprising a first radiation source and a first detector, and the second detection component comprising a second radiation source and a second detector; wherein the medical data acquisition method comprises the following steps: determining a radiation source included angle between the first radiation source and the second radiation source; acquiring a preset projection angle of the medical detection system and a number of flying focal points; calculating a first delay time according to the radiation source included angle and the projection angle, and calculating a second delay time according to the radiation source included angle, the projection angle and the number of flying focal points; and controlling the first detector and the second detector to respectively acquire medical data based on the first delay time and the second delay time. Through the application, the problem of low accuracy of medical data acquisition is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical data processing, and in particular to a medical data acquisition method, device and CT heart scan control method. BACKGROUND

[0002] Computed Tomography (CT) is a medical detection system for detecting diseases in human body by scanning a certain thickness of a layer of human body with radioactive beams, and receiving the radioactive rays penetrating through the layer by a detector. In order to improve the scanning speed, a double-source system can be realized at present, that is, a ball tube A and a ball tube B in the system are used for scanning respectively, and the data of corresponding detectors A and B are used for reconstructing images. Then, in the double-source medical detection system, there is a position error in the installation process of the ball tube A and the ball tube B, or the position of the ball tube may change during the use of the sample machine, which causes the medical data collected by the detector A and the detector B to be unable to be aligned, thereby affecting the accuracy of medical data acquisition.

[0003] At present, there is no effective solution to the problem of low accuracy of medical data acquisition in the related art. SUMMARY

[0004] Embodiments of the present application provide a medical data acquisition method, device and CT heart scan control method to at least solve the problem of low accuracy of medical data acquisition in the related art.

[0005] In a first aspect, the embodiments of the present application provide a medical data acquisition method applied to a medical detection system comprising a first detection component and a second detection component, the first detection component comprising a first radioactive source and a first detector, and the second detection component comprising a second radioactive source and a second detector; the method comprising:

[0006] determining a radioactive source included angle between the first radioactive source and the second radioactive source;

[0007] obtaining a preset projection angle of the medical detection system, and obtaining a number of flying focal points;

[0008] calculating a first delay time according to the radioactive source included angle and the projection angle, and calculating a second delay time according to the radioactive source included angle, the projection angle and the number of flying focal points;

[0009] controlling the first detector and the second detector to collect medical data respectively based on the first delay time and the second delay time.

[0010] In some embodiments, the calculation of the second delay time according to the radioactive source included angle, the projection angle and the number of flying focal points comprises:

[0011] calculating an integer quotient between the projection angle and the radiation source included angle;

[0012] calculating a first remainder value between the integer quotient and the number of fly focus, and taking the first remainder value as a multiple of the projection angle, and calculating the second delay time based on the multiple of the projection angle.

[0013] In some embodiments, the controlling the first detector and the second detector to respectively acquire medical data based on the first delay time and the second delay time comprises:

[0014] determining a target delay detector from the first detector and the second detector;

[0015] controlling the target delay detector to delay acquisition according to the first delay time and the second delay time;

[0016] acquiring medical data acquired by the first detector and medical data acquired by the second detector respectively in the case that the target delay detector delays acquisition.

[0017] In some embodiments, the calculating the first delay time according to the projection angle and the radiation source included angle comprises:

[0018] calculating a second remainder value between the projection angle and the radiation source included angle;

[0019] obtaining a correlation between the second remainder value and a required delay time based on the target delay detector, and calculating the first delay time based on the correlation.

[0020] In some embodiments, the determining the radiation source included angle between the first radiation source and the second radiation source comprises:

[0021] obtaining first raw data originally acquired by the first detector and second raw data originally acquired by the second detector;

[0022] determining a first fitting function according to the first raw data, and obtaining a first fitting phase parameter based on the first fitting function; determining a second fitting function according to the second raw data, and obtaining a second fitting phase parameter based on the second fitting function;

[0023] calculating the radiation source included angle according to the first fitting phase parameter and the second fitting phase parameter.

[0024] In some embodiments, the controlling the first detector and the second detector to respectively acquire medical data based on the first delay time and the second delay time comprises:

[0025] calculating a total delay time based on the first delay time and the second delay time;

[0026] controlling the first detector or the second detector to delay sampling according to the total delay time;

[0027] acquiring medical data acquired by the first detector and medical data acquired by the second detector respectively in the case that the first detector or the second detector delays sampling.

[0028] In a second aspect, the embodiments of the present application provide a CT heart scan control method, and the method comprises:

[0029] acquiring medical data acquired by a first detector and medical data acquired by a second detector in a CT heart scan process; wherein the medical data is obtained according to the medical data acquisition method in the first aspect;

[0030] splicing the medical data of the first detector and the medical data of the second detector, and reconstructing to generate a target medical image for CT heart scan.

[0031] In a third aspect, the embodiments of the present application provide a medical data acquisition device, which is applied to a medical detection system comprising a first detection component and a second detection component, the first detection component comprises a first radiation source and a first detector, and the second detection component comprises a second radiation source and a second detector; the device comprises:

[0032] an included angle determination module, configured to determine a radiation source included angle between the first radiation source and the second radiation source;

[0033] a first acquisition module, configured to acquire a preset projection angle of the medical detection system, and acquire a number of flying focal points;

[0034] a delay module, configured to calculate a first delay time according to the radiation source included angle and the projection angle, and calculate a second delay time according to the radiation source included angle, the projection angle and the number of flying focal points;

[0035] a sampling module, configured to control the first detector and the second detector to respectively acquire medical data based on the first delay time and the second delay time.

[0036] In a fourth aspect, the embodiments of the present application provide a medical image reconstruction device, and the device comprises:

[0037] The second acquisition module is configured to acquire medical data collected by the first detector and the second detector respectively, wherein the medical data is obtained according to the medical data acquisition method of the first aspect.

[0038] The generation module is configured to splice the medical data of the first detector and the medical data of the second detector, and reconstruct a target medical image.

[0039] In a fifth aspect, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the medical data acquisition method of the first aspect or the CT heart scan control method of the second aspect when executing the computer program.

[0040] In a sixth aspect, a storage medium is provided, which stores a computer program executable by a processor to implement the medical data acquisition method of the first aspect or the CT heart scan control method of the second aspect.

[0041] Compared with the related art, the medical data acquisition method, device and CT heart scan control method provided by the embodiments of the present application are applied to a medical detection system including a first detection component and a second detection component, the first detection component including a first radiation source and a first detector, and the second detection component including a second radiation source and a second detector; the radiation source included angle between the first radiation source and the second radiation source is determined; a preset projection angle of the medical detection system is acquired, and the number of fly focus points is acquired; the first delay time is calculated according to the radiation source included angle and the projection angle, and the second delay time is calculated according to the radiation source included angle, the projection angle and the number of fly focus points; the first detector and the second detector are controlled to collect medical data respectively based on the first delay time and the second delay time, thereby avoiding the problem that in the case that the medical detection system includes multiple detection components, the scanning data of each detection component cannot be correctly spliced due to the change of the position of the radiation source and the like, effectively solving the problem of low accuracy of medical data acquisition, and realizing an efficient and accurate medical data acquisition method.

[0042] Details of one or more embodiments of the present application are presented in the following drawings and description to make other features, objects and advantages of the present application more apparent. BRIEF DESCRIPTION OF DRAWINGS

[0043] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application and illustrate embodiments of the present application and its description, which serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0044] Figure 1 is a hardware structure block diagram of a terminal of a medical data acquisition method according to an embodiment of the present application;

[0045] Figure 2 is a schematic diagram of a medical detection system according to an embodiment of the present application;

[0046] Figure 3 is a flow chart of a medical data acquisition method according to an embodiment of the present application;

[0047] Figure 4 is a schematic diagram of a medical data acquisition method according to an embodiment of the present application;

[0048] Figure 5A is a schematic diagram of a time-delayed sampling sequence according to an embodiment of the present application;

[0049] Figure 5B is a schematic diagram of another time-delayed sampling sequence according to an embodiment of the present application;

[0050] Figure 6 is a schematic diagram of a curve fitting according to an embodiment of the present application;

[0051] Figure 7 is a flow chart of a CT heart scan control method according to an embodiment of the present application;

[0052] Figure 8 is a structure block diagram of a medical data acquisition device according to an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application is described and explained below in connection with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application. In addition, it should be understood that although the efforts made in this development process can be complex and lengthy, some design, manufacture or production changes made on the basis of the technical content disclosed in the present application by those of ordinary skill in the art related to the content disclosed in the present application are only routine technical means and should not be understood as insufficient disclosure of the present application.

[0054] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0055] Unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by a person of ordinary skill in the technical field to which this application belongs. The words "one", "a", "the" and the like used in this application do not indicate a limit on quantity and may indicate the singular or plural. The terms "include", "comprise", "have" and any variations thereof used in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units that are inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The word "multiple" used in this application means greater than or equal to two. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The terms "first", "second", "third" and the like involved in this application are merely used to distinguish similar objects and do not represent a specific ordering of the objects.

[0056] The method embodiment provided in this embodiment can be executed in a terminal, a computer or a similar computing device. Taking running on a terminal as an example, Figure 1 This is a hardware structure diagram of a terminal of a medical data acquisition method according to an embodiment of the present application. Figure 1 As shown, the terminal may include one or more ( Figure 1 Only one is shown) a processor 102 (the processor 102 may include but is not limited to a microprocessor MCU or a programmable logic device FPGA and other processing devices) and a memory 104 for storing data. Optionally, the terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It will be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above terminal. Figure 1 More or fewer components than shown, or with Figure 1Different configurations shown.

[0057] The memory 104 can be used to store computer programs, such as software programs and modules of application software, such as the computer program corresponding to the medical data acquisition method in the embodiment of the present invention. The processor 102 executes the computer program stored in the memory 104 to perform various functional applications and data processing, thereby implementing the above-mentioned method. The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories may be connected to the terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0058] The transmission device 106 is used to receive or send data via a network. A specific example of the aforementioned network may include a wireless network provided by the terminal's communications provider. In one embodiment, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to enable communication with the Internet. In another embodiment, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0059] In order to facilitate understanding of the medical data collection method provided in the embodiment of the present application, the following first describes its application scenario. Figure 2 The medical data acquisition method is applied to a medical detection system; the medical detection assembly comprises at least a first detection assembly and a second detection assembly; the first detection assembly comprises a first radiation source and a first detector, and the second detection assembly comprises a second radiation source and a second detector. More specifically, each radiation source comprises a tube for emitting radiation, such as X-rays, toward a location to be scanned.

[0060] In related technologies, due to the positional errors between the first and second radioactive sources of different samples during installation, or the possible changes in the position of the radioactive sources during the use of the sample, when the scanning protocol indicates that the data collected by the first detector and the second detector cannot be aligned, resulting in the inability to splice the data of the first and second detectors during image reconstruction. Figure 2As an example of the system shown, if the included angle between the first radiation source and the second radiation source is 95.7°, 2400 projection data are scanned per circle, and one projection data corresponds to a projection angle of 0.15°; then the radiation source included angle is an integer multiple of the single projection angle, and the first detector and the second detector simultaneously collect data during system scanning, at which time the projection data collected by the first detector and the second detector can be aligned. However, if the included angle between the first radiation source and the second radiation source is 95.75°, which is not an integer multiple of the single projection angle, at this time it cannot be guaranteed that the projection data collected by the first detector and the second detector are aligned, resulting in that the projection data cannot be spliced during reconstruction.

[0061] Based on this, the embodiment provides a medical data acquisition method, Figure 3 is a flowchart of a medical data acquisition method according to an embodiment of the present application, as shown in the figure, the flow includes the following steps: Figure 3

[0062] Step S310, determining the radiation source included angle between the first radiation source and the second radiation source.

[0063] The above-mentioned radiation source included angle refers to the included angle between the angle position of the first radiation source and the angle position of the second radiation source. For example, please refer to Figure 2 At this time, the included angle between the position of the radiation source A and the position of the radiation source B is 95.2°. The radiation source included angle can be obtained based on system detection.

[0064] Step S320, obtaining a preset projection angle of a medical detection system, and obtaining a flying focus number.

[0065] The above-mentioned projection angle refers to the angle of the radiation source projection in the medical detection system corresponding to a single projection data. The projection angle can be obtained by the parameter in the scanning protocol. More specifically, the scanning protocol can be configured with the parameter value of the number of Views per circle, and then the projection angle can be obtained by calculating 360° / number of Views per circle; for example, if 2400 Views per circle are scanned, the angle corresponding to one View can be calculated, that is, the projection angle is 0.15°.

[0066] The flying focus technology is a technology for improving the CT image resolution without changing the CT detector hardware parameters. Generally, the implementation is to periodically switch the focal position of the X-ray tube at multiple positions during projection data acquisition. The above-mentioned flying focus number refers to the number of focal positions at the multiple positions of the periodic switching. The flying focus number can be obtained by the parameter in the scanning protocol.

[0067] ​Step S330, according to the projection angle and the projection angle, the first delay time is calculated, and according to the projection angle, the projection angle and the number of flying focus, the second delay time is calculated.

[0068] In this step, it can be first judged whether the current radiation source angle is an integer multiple of the projection angle. If yes, the first detector or the second detector delay sampling is not needed. If not, the remainder value of the radiation source angle divided by the projection angle is calculated, which is the angle required for the detector to delay, therefore, the delay sampling time of the first detector or the second detector can be determined based on the remainder angle value. Exemplarily, please refer to projection 2 and Figure 4 . Assuming that the angle between the first radiation source and the second radiation source is 95.7°, that is, Figure 4 the angle between the angle position where the first radiation source of the tube A starts to project and the angle position where the second radiation source of the tube B starts to project is 95.7°. At this time, the delay angle difference between the radiation source angle and the integer multiple of the projection angle can be obtained by subtracting 3 times the projection angle from the radiation source angle; the delay angle difference is the angle error value between the radiation sources; then based on the delay angle difference, the first delay time of the second detector required delay parameter can be calculated, as shown in the following formula:

[0069] The first delay time = mod(radiation source angle, projection angle) x rotation speed / 360

[0070] In the above formula, mod() is used to represent the function of calculating the remainder of two numbers.

[0071] On the other hand, for the case of different number of flying focus, it is necessary to ensure that the flying focus positions of each radiation source are aligned. Please refer to Figure 4 , for example, the number of flying focus is two, the flying focus switching pulse of the first radiation source and the flying focus switching pulse of the second radiation source exist deviation, need to align Figure 4 the flying focus a of the first radiation source with the flying focus a of the second radiation source, and the flying focus b of the first radiation source with the flying focus b of the second radiation source. Specifically, the multiple between the radiation source angle and the projection angle can be calculated, if the multiple is an integer multiple of the number of flying focus, it means that the flying focus position of the first radiation source is aligned with the flying focus position of the second radiation source, and there is no need to delay the parameter based on the flying focus; otherwise, the remainder n of the multiple divided by the number of flying focus can be controlled to delay the sampling n times of the projection angle of the first radiation source or the second radiation source.

[0072] More specifically, in an optional embodiment, the above-mentioned calculation of the second delay time according to the source angle, the projection angle and the number of fly focus points further comprises the following steps: calculating the integer quotient between the source angle and the projection angle, i.e. calculating the value of source angle / projection angle; then calculating the first remainder value between the integer quotient and the number of fly focus points, i.e. first remainder value = mod(source angle / projection angle, number of fly focus points); and taking the first remainder value as a multiple of the projection angle, and calculating the second delay time based on the multiple of the projection angle.

[0073] That is, the above-mentioned calculation formula of the second delay time is as follows:

[0074] Second delay time = mod(source angle / projection angle, number of fly focus points) x projection angle x rotation speed / 360

[0075] It should be understood that when the number of fly focus points is only 1, the above-mentioned calculation formula of the second delay time can be directly used, at this time mod(source angle / projection angle, number of fly focus points) is always 0, so the calculated second delay time is 0; or, the number of fly focus points can be first determined, when it is detected that the number of fly focus points is ≥2, the above-mentioned formula is used to calculate the second delay time, when it is detected that the number of fly focus points is 1, the above-mentioned formula does not need to be used for calculation, i.e. the second delay time is automatically determined to be 0, thereby reducing the calculation time.

[0076] Step S340, based on the first delay time and the second delay time, controlling the first detector and the second detector to respectively collect medical data.

[0077] Based on the above-mentioned calculated first delay time, the first detector or the second detector is controlled to delay the data collection time, and then in this case, the medical data collected by each detector is obtained. Specifically, the multi-source medical detection system separately configures the acquisition start time and other acquisition parameters for each set of detection assembly. When the first delay time and the second delay time are obtained based on the above-mentioned steps, the sum of the first delay time and the second delay time is calculated, i.e. the total delay time is obtained; next, the first detector or the second detector can be controlled to delay the above-mentioned total delay time based on the original acquisition start time, so as to ensure that the projection data and the fly focus position are aligned when each detector acquires data, and the medical data collected by the first detector and the medical data collected by the second detector are respectively obtained in the case of delaying the acquisition of the first detector or the second detector.

[0078] It can be understood that the medical detection system also includes at least three sets of detection assemblies as far as the embodiments allow. Taking the medical detection system also including a third detection assembly as an example, the third detection assembly includes a third radiation source and a third detector. Then, in the application process, the radiation source included angle between the second radiation source and the first radiation source and the radiation source included angle between the third radiation source and the first radiation source can be determined respectively, and based on the above steps, the delay time of the required delay number of the second radiation source and the third radiation source is calculated according to the respective corresponding radiation source included angle and projection angle, and then the delay number time planning of each detector is realized under the application of multiple detection assemblies.

[0079] The specific embodiments will be described below. Please refer to Figure 5A and Figure 5B , Figure 5A For the case where the total delay time is less than 1 projection data corresponding time, the difference between the positions where the first detector and the second detector start sampling is just the angle error value between the two radiation sources. Figure 5B For the case where the total delay time is less than 2 projection data corresponding time and greater than 1 projection data corresponding time, the difference between the positions where the first detector and the second detector start sampling is the sum of 1 projection angle and angle error value.

[0080] In the above medical data acquisition method, the first delay time of the detector delay sampling is calculated by the determined radiation source included angle and projection angle to plan the sampling time of multiple detectors, so as to avoid the problem that when the medical detection system includes multiple detection assemblies, the scanning data of each detection assembly cannot be correctly spliced due to the change of the position of the radiation source and other phenomena, effectively solve the problem of low accuracy of medical data acquisition, and realize the efficient and accurate medical data acquisition method. Meanwhile, in the related art, when the scanning protocol is configured with multiple fly focus points, the fly focus point positions between the detection assemblies may also deviate, thereby affecting the splicing of the acquired data. While considering the radiation source included angle, the embodiments of the present application also introduce the detection of the number of fly focus points, thereby realizing the delay sampling time planning mode combining the radiation source angle alignment and fly focus point position alignment, and effectively improving the accuracy of medical data acquisition.

[0081] In some embodiments, the above step of controlling the first detector and the second detector to acquire medical data based on the first delay time and the second delay time further includes the following steps:

[0082] Step S341, determining a target delay detector corresponding to the target delay radiation source in the first detector and the second detector.

[0083] The target delayed detector refers to the detector in each detection assembly whose acquisition time needs to be delayed. In this step, the target delayed radioactive source in the first and second radioactive sources can be determined based on the installation positions of the respective radioactive sources. The target delayed radioactive source can then be identified as the detector in the same detection assembly as the target delayed radioactive source.

[0084] Step S342, controlling the target delay detector to delay data acquisition according to the first delay time and the second delay time; when the target delay detector delays data acquisition, respectively acquiring the medical data acquired by the first detector and the medical data acquired by the second detector.

[0085] In some embodiments, the step of calculating the first delay time based on the radiation source angle and the projection angle further includes the following steps:

[0086] Step S331: Calculate the second remainder between the radiation source angle and the projection angle, that is, the second remainder = mod (angle between tube AB, angle corresponding to each View).

[0087] Step S332: Based on the target delay detector, obtain the correlation between the second remainder value and the required delay time, and calculate the first delay time based on the correlation.

[0088] It should be noted that, considering the positional relationship between the radiation sources, if the target delay detectors are different, the above-mentioned correlation relationship will also be different accordingly. Figure 2 and Figure 4 For example, the two sets of detection components in the system are driven by the system frame in a clockwise order to rotate and start scanning, and along the rotation direction of the frame, the first radiation source is located to the right of the second radiation source. Then the angular position of each projection data collected by the first detector and the angular position of each projection data collected by the second detector are as follows: Figure 4 As shown, if the second radiation source is predetermined to be the target delayed radiation source, and accordingly, the second detector is the target delayed detector, then the correlation between the second remainder value and the required delay time is as shown in Formula 1 above. Substituting the second remainder value into Formula 1, the delay time of the second detector can be calculated. Alternatively, if the first radiation source is determined to be the target delayed radiation source, then the correlation between the second remainder value and the delay time corresponding to the first detector is as shown in the following formula: First Delay Time = (Projection Angle - Mod (Radiation Source Angle, Projection Angle)) × Rotation Speed ​​ / 360.

[0089] Next, the target delay detector is controlled to delay sampling according to the first delay time; in the case of target delay detector delay sampling, the medical data collected by the first detector and the medical data collected by the second detector are respectively acquired.

[0090] Through the above embodiment, the association between the corresponding second remainder value and the delay time is determined based on the target delay detector, thereby further improving the accuracy of the delay time calculation, and further improving the accuracy of the medical data acquisition.

[0091] In some embodiments, the above-mentioned determination of the radiation source included angle between the first radiation source and the second radiation source further includes the following steps:

[0092] Step S311, acquiring first raw data originally collected by the first detector and second raw data originally collected by the second detector.

[0093] In the radiation source included angle correction process, each set of detection components in the above-mentioned medical detection system scans the phantom data and simultaneously samples; through the raw data obtained by sampling, the corresponding sinusoidal curve can be extracted, as shown in the following figure: Figure 6 In the figure, the vertical coordinate represents the angle value of the radiation source, and the horizontal coordinate represents the number of collected projection data.

[0094] Step S312, determining a first fitting function according to the first raw data, and obtaining a first fitting phase parameter based on the first fitting function; determining a second fitting function according to the second raw data, and obtaining a second fitting phase parameter based on the second fitting function.

[0095] Specifically, based on the above-mentioned raw data or the sinusoidal curve extracted from the raw data, the corresponding fitting function can be derived, as shown in the following formula:

[0096]

[0097] In the above formula, chn_angle represents the number of detection channels of the medical detection component, nView is the total number of views in one scan, C2 is the distance from the ball bearing to the center of rotation, and SID is the distance from the ball bearing focus to the center of rotation. C1 and C2 are fitting parameters; C1 is the initial value of the view number corresponding to the starting angle of the scan when fitting. It can be seen that the fitting parameter C1 corresponding to each set of detection components can be calculated based on the above formula 3, that is, the above-mentioned fitting phase parameter is obtained; wherein the first fitting phase parameter can be represented as C 1,A , and the second fitting phase parameter can be represented as C 1,B .

[0098] Step S313, calculating the radiation source included angle according to the first fitting phase parameter and the second fitting phase parameter.

[0099] In this step, the phase C 1,A , C 1,B After that, the included angle RealAngle between the two radiation sources can be obtained from the phase difference ΔC=C 1,A -C 1,B , as shown in the following formula:

[0100]

[0101] Through the above embodiment, the phase parameters of each radiation source are determined by using the fitting function, and the included angle between the current radiation sources can be accurately calculated, which is beneficial to improve the accuracy of planning the data acquisition delay time of the detector based on the included angle of the radiation source, and further improves the accuracy of medical data acquisition.

[0102] The embodiment also provides a CT heart scan control method, wherein, in order to improve the scanning speed, a dual-source CT system is used for heart scanning. Figure 7 is a flow chart of a CT heart scan control method according to an embodiment of the application, as shown in Figure 7 , the flow includes the following steps:

[0103] Step S710, in the CT heart scan process, medical data collected by a first detector and a second detector are acquired; wherein the medical data is obtained according to the medical data acquisition method of any of the above embodiments.

[0104] Step S720, the medical data of the first detector and the medical data of the second detector are spliced, and a target medical image for CT heart scan is generated by reconstruction.

[0105] In this step, after the delay acquisition time of the detector is planned based on the included angle of the radiation source, the medical data collected by the first detector is aligned with the medical data collected by the second detector, and based on the spliced data after alignment, the image is reconstructed by using algorithms such as fan beam reconstruction, back projection method, iteration method or filter back projection method, and finally the target medical image is generated.

[0106] Through the above steps S710 to S720, in the CT heart scan process, the first detector and the second detector are controlled by delay acquisition, so that the medical data collected by each detector can be accurately spliced in the reconstruction process, thereby realizing the CT heart scan control method which can reconstruct a high-quality medical image.

[0107] It is noted that the steps illustrated in the above flow or in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order of the steps is shown, in some cases, the steps shown or described can be executed in an order different from that shown.

[0108] The embodiments also provide a medical data acquisition device applied to a medical detection system comprising a first detection assembly and a second detection assembly, the first detection assembly comprising a first radiation source and a first detector, and the second detection assembly comprising a second radiation source and a second detector; the device is used to implement the above-mentioned embodiments and preferred embodiments, which have been described and will not be repeated. As used below, the terms "module", "unit", "sub-unit" and the like can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware or a combination of software and hardware is also possible and contemplated.

[0109] Figure 8 is a structural block diagram of a medical data acquisition device according to an embodiment of the present application, as shown in Figure 8 the device comprises: an included angle determination module 82 configured to determine a radiation source included angle between the first radiation source and the second radiation source; a first acquisition module 84 configured to acquire a preset projection angle of the medical detection system and acquire a number of fly focus points; a delay module 86 configured to calculate a first delay time according to the radiation source included angle and the projection angle, and calculate a second delay time according to the radiation source included angle, the projection angle and the number of fly focus points; and a sampling module 88 configured to control the first detector and the second detector to respectively acquire medical data based on the first delay time and the second delay time.

[0110] In some embodiments, the delay module 86 is further configured to, in a case where it is detected that the number of fly focus points is at least two, calculate an integer quotient between the radiation source included angle and the projection angle; the delay module 86 calculates a first remainder value between the integer quotient and the number of fly focus points, and takes the first remainder value as a multiple of the projection angle, and calculates the second delay time based on the multiple of the projection angle.

[0111] In some embodiments, the sampling module 88 is further configured to determine a target delay detector corresponding to a target delay radiation source from among the first detector and the second detector; the sampling module 88 controls the target delay detector to delay sampling according to the first delay time and the second delay time; and the sampling module 88 acquires medical data acquired by the first detector and medical data acquired by the second detector in a case where the target delay detector delays sampling.

[0112] In some embodiments, the delay module 86 calculates a second remainder value between the projection angle and the angle between the radiation source and the target; the delay module 86 obtains a correlation between the second remainder value and a required delay time based on the target delay detector, and calculates the first delay time based on the correlation.

[0113] In some embodiments, the delay module 86 is further configured to control the target delay detector to delay sampling by the first delay time; the delay module 86 obtains medical data collected by the first detector and medical data collected by the second detector respectively when the target delay detector delays sampling.

[0114] In some embodiments, the angle determination module 82 is further configured to obtain first raw data collected by the first detector and second raw data collected by the second detector; the angle determination module 82 determines a first fitting function based on the first raw data and obtains a first fitting phase parameter based on the first fitting function; determines a second fitting function based on the second raw data and obtains a second fitting phase parameter based on the second fitting function; and calculates the angle between the radiation source and the target based on the first fitting phase parameter and the second fitting phase parameter.

[0115] In some embodiments, the sampling module 88 is further configured to calculate a total delay time based on the first delay time and the second delay time; the sampling module 88 controls the first detector or the second detector to delay sampling according to the total delay time; and the sampling module 88 obtains medical data collected by the first detector and medical data collected by the second detector respectively when the first detector or the second detector delays sampling.

[0116] The embodiment also provides a medical image reconstruction device, comprising:

[0117] A second obtaining module is configured to obtain medical data collected by a first detector and medical data collected by a second detector; wherein the medical data is obtained based on the medical data collection method according to any one of the above embodiments;

[0118] A generating module is configured to splice the medical data of the first detector and the medical data of the second detector, and reconstruct a target medical image.

[0119] It should be noted that each of the above modules can be a functional module or a program module, and can be implemented by software or hardware. For the modules implemented by hardware, each of the above modules can be located in the same processor; or each of the above modules can be located in different processors in any combination.

[0120] The embodiment also provides an electronic device including a memory and a processor, the memory storing a computer program, and the processor being configured to execute the computer program to perform the steps in any of the above method embodiments.

[0121] Optionally, the electronic device described above can further include a transmission device connected with the processor and an input and output device connected with the processor.

[0122] Optionally, in the embodiment, the processor can be configured to perform the following steps by the computer program:

[0123] S1, determining a radiation source included angle between the first radiation source and the second radiation source.

[0124] S2, obtaining a preset projection angle of the medical detection system and obtaining a number of fly focus points.

[0125] S3, calculating a first delay time according to the radiation source included angle and the projection angle, and calculating a second delay time according to the radiation source included angle, the projection angle and the number of fly focus points.

[0126] S4, controlling the first detector and the second detector to respectively collect medical data based on the first delay time.

[0127] It should be noted that the specific examples in the embodiment can refer to the examples described in the above embodiments and optional implementation manners, and the embodiment will not be described here.

[0128] In addition, in combination with the medical data collection method in the above embodiments, the embodiment of the application can provide a storage medium for implementation. The storage medium stores a computer program; the computer program is executed by the processor to implement any of the medical data collection methods or CT heart scan control methods in the above embodiments.

[0129] Those skilled in the art should understand that the technical features of the above embodiments can be combined in any way, and in order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0130] The above-described embodiments only express several implementation manners of the application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the application, some modifications and improvements can be made, which are all within the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A medical data collection method, characterized in that: Applied to a medical detection system comprising a first detection assembly and a second detection assembly, wherein the first detection assembly comprises a first radiation source and a first detector, and the second detection assembly comprises a second radiation source and a second detector; the method comprises: determining a radiation source angle between the first radiation source and the second radiation source; Obtaining a preset projection angle of the medical detection system and the number of flying focal spots; the projection angle refers to the angle of projection of the radiation source in the medical detection system corresponding to a single projection data; Calculating a first delay time according to the radiation source angle and the projection angle, and calculating a second delay time according to the radiation source angle, the projection angle, and the number of flying focal points; Based on the first delay time and the second delay time, controlling the first detector and the second detector to respectively collect medical data includes: determining a target delayed detector among the first detector and the second detector; Control the target delay detector to delay data acquisition according to the first delay time and the second delay time; In the case where the target delayed detector delays data acquisition, medical data acquired by the first detector and medical data acquired by the second detector are acquired respectively.

2. The medical data acquisition method according to claim 1, characterized in that: Calculating the second delay time according to the radiation source angle, the projection angle, and the number of flying focal points includes: Calculating an integer quotient between the radiation source angle and the projection angle; Calculate a first remainder value between the integer quotient and the number of flying focal points, use the first remainder value as a multiple of the projection angle, and calculate the second delay time based on the multiple of the projection angle.

3. The medical data acquisition method according to claim 1, characterized in that: The calculating the first delay time according to the radiation source angle and the projection angle includes: Calculating a second remainder value between the radiation source angle and the projection angle; Based on the target delay detector, a correlation relationship between the second remainder value and the required delay time is obtained, and based on the correlation relationship, the first delay time is calculated.

4. The medical data acquisition method according to any one of claims 1 to 3, characterized in that: The determining of the radiation source angle between the first radiation source and the second radiation source includes: Acquire first raw data originally collected by the first detector and second raw data originally collected by the second detector; Determine a first fitting function according to the first raw data, and obtain a first fitting phase parameter based on the first fitting function; determine a second fitting function according to the second raw data, and obtain a second fitting phase parameter based on the second fitting function; The radiation source angle is calculated based on the first fitting phase parameter and the second fitting phase parameter.

5. The medical data acquisition method according to any one of claims 1 to 3, characterized in that: The controlling the first detector and the second detector to respectively collect medical data based on the first delay time and the second delay time includes: Calculate a total delay time based on the first delay time and the second delay time; Controlling the first detector or the second detector to delay data acquisition according to the total delay time; In the case where the first detector or the second detector delays data acquisition, the medical data acquired by the first detector and the medical data acquired by the second detector are acquired respectively.

6. A CT heart scan control method, characterized in that: The method comprises: During a CT heart scan, obtaining medical data collected by the first detector and the second detector, respectively; wherein the medical data is obtained according to the medical data collection method according to any one of claims 1 to 5; The medical data of the first detector and the medical data of the second detector are spliced ​​together, and a target medical image for CT heart scanning is reconstructed and generated.

7. A medical data acquisition device, characterized in that: Applicable to a medical detection system comprising a first detection assembly and a second detection assembly, wherein the first detection assembly comprises a first radiation source and a first detector, and the second detection assembly comprises a second radiation source and a second detector; the device comprises: An angle determination module, configured to determine a radiation source angle between the first radiation source and the second radiation source; A first acquisition module is configured to acquire a preset projection angle of the medical detection system and the number of flying focal spots; the projection angle refers to an angle of projection of a radiation source in the medical detection system corresponding to a single projection data; a delay module, configured to calculate a first delay time according to the radiation source angle and the projection angle, and to calculate a second delay time according to the radiation source angle, the projection angle, and the number of flying focal points; The data acquisition module is used to control the first detector and the second detector to respectively acquire medical data based on the first delay time and the second delay time, including: determining a target delayed detector among the first detector and the second detector; controlling the target delayed detector to delay data acquisition according to the first delay time and the second delay time; and acquiring the medical data acquired by the first detector and the medical data acquired by the second detector respectively when the target delayed detector delays data acquisition.

8. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to run the computer program to execute the medical data acquisition method according to any one of claims 1 to 5, or the CT cardiac scanning control method according to claim 6.

9. A storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the medical data acquisition method according to any one of claims 1 to 5, or the CT cardiac scanning control method according to claim 6 when running.

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