Exposure method, medical imaging system, electronic device, and storage medium

Abstract

The application relates to an exposure method, a medical imaging system, an electronic device and a storage medium, wherein the exposure method comprises the following steps: acquiring heart rate data of an object to be exposed and an exposure period; selecting an exposure mode corresponding to the heart rate data according to the heart rate data; and exposing the object to be exposed according to the exposure mode and the exposure period. According to the application, the object to be scanned with abnormal heart rate and the object to be scanned with normal heart rate can be scanned, and the scanning accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical images, in particular to an exposure method, a medical imaging system, an electronic device and a storage medium. BACKGROUND

[0002] X-ray imaging is a radiographic method using the penetration property of X-rays, which depicts the internal structure of an object based on the amount of X-rays attenuated during the penetration of a field of view (FOV). Current X imaging devices, such as CT scanning devices, have been widely used for scanning imaging of an object using X-rays. Traditional X-ray scanning imaging generally uses the attenuation characteristics of the measured material to the X-rays to non-destructively inspect the internal structure of the object. If the density difference of each part of the internal structure of the object is obvious, the effect of the traditional X-ray imaging technology is particularly significant.

[0003] Computed Tomography (CT) is a relatively advanced clinical examination imaging technology in the field of medical imaging. Through the CT scanning system, doctors can clearly observe the body tissue conditions that ordinary X-ray films cannot display, such as cerebral hemorrhage or various small tumors, etc., so that the clinical diagnosis level is significantly improved. The CT scanning device uses a precisely collimated X-ray beam together with a highly sensitive detector to make one after another cross-sectional scans around a certain part of the human body. According to the different absorption and transmission rates of different human tissues to the X-ray beam, the detector measures the X-ray beam that has transmitted through the human body, and inputs the obtained data into an electronic computer. After the electronic computer processes the data, it can take the cross-sectional or three-dimensional image of the part of the human body being examined, find small lesions in any part of the body, and has the characteristics of fast scanning time, clear image, etc., and can be used for the examination of various diseases.

[0004] Currently, when using a CT device to perform a forward-looking heart scan, the CT device plans an exposure time period according to a time phase selected by a physician and performs exposure. During the exposure process, once a heart rate anomaly occurs, the previously planned exposure time period cannot cover the time phase expected by the physician, resulting in a failed scan. SUMMARY

[0005] Embodiments of the present application provide an exposure method, a medical imaging system, an electronic device and a storage medium to at least solve the problem of exposure failure due to a heart rate anomaly in related technologies.

[0006] In a first aspect, an exposure method is provided, including: obtaining heart rate data of an object to be exposed and an exposure period; selecting an exposure mode corresponding to the heart rate data according to the heart rate data; and exposing the object to be exposed according to the exposure mode and the exposure period.

[0007] In one of the embodiments, the acquiring the heart rate data of the object to be exposed and the exposure period comprises: acquiring an electrocardio signal of the object to be exposed; counting the number of times of heart rate abnormalities of the object to be exposed in a preset time range according to the electrocardio signal; and obtaining the heart rate type of the object to be exposed according to the number of times of heart rate abnormalities; the heart rate type comprises: a first heart rate type, a second heart rate type and a third heart rate type; the number of times of heart rate abnormalities in the preset time range of the first heart rate type is less than the number of times of heart rate abnormalities in the preset time range of the second heart rate type.

[0008] In one of the embodiments, if the heart rate type is the first heart rate type, a first exposure mode is selected; and the medical exposure of the object to be exposed according to the exposure mode and the exposure period comprises: exposing the object to be exposed based on the exposure period; stopping the exposure if a heart rate abnormality is detected in the exposure period; and exposing the object to be exposed again based on the exposure period until the exposure of the object to be exposed is completed in the exposure period.

[0009] In one of the embodiments, if the heart rate type is the second heart rate type, a second exposure mode is selected; and the medical exposure of the object to be exposed according to the exposure mode and the exposure period comprises: exposing the object to be exposed based on the exposure period; stopping the exposure if a heart rate abnormality is detected in the exposure period; exposing the object to be exposed again based on the exposure period; and exposing the object to be exposed according to a heart rate abnormality mode if a heart rate abnormality is detected again in the exposure period.

[0010] In one of the embodiments, the heart rate type further comprises a third heart rate type; the number of times of heart rate abnormalities in the preset time range of the second heart rate type is less than the number of times of heart rate abnormalities in the preset time range of the third heart rate type; if the heart rate type is the third heart rate type, a third exposure mode is selected; and the medical exposure of the object to be exposed according to the exposure mode and the exposure period comprises: exposing the object to be exposed based on the exposure period; and exposing the object to be exposed according to the heart rate abnormality mode if a heart rate abnormality is detected in the exposure period.

[0011] In one of the embodiments, the heart rate abnormality mode comprises: acquiring a heart cycle in a preset number of times before a current exposure period and initial exposure time and ending exposure time of the current exposure period; acquiring a single-circle rotation time of a gantry of an exposure device; calculating a minimum exposure time according to the single-circle rotation time, the initial exposure time and the ending exposure time; calculating a maximum exposure time according to the heart cycle in the preset number of times, the initial exposure time and the ending exposure time; detecting R wave information in real time; and completing the exposure of the object to be exposed according to the R wave information, the initial exposure time, the minimum exposure time and the maximum exposure time.

[0012] In one of the embodiments, the real-time detection of the R-wave information, the exposure of the object to be exposed according to the R-wave information, the initial exposure time, the minimum exposure time and the maximum exposure time includes: if two R-waves are detected within the initial exposure time and the minimum exposure time, the exposure of the object to be exposed is completed at the minimum exposure time; if two R-waves are detected within the initial exposure time and the maximum exposure time, and the time of the second R-wave is within the minimum exposure time and the maximum exposure time, the exposure of the object to be exposed is completed at the time of the second R-wave; and if two R-waves are not detected within the initial exposure time and the maximum exposure time, the exposure of the object to be exposed is completed at the maximum exposure time.

[0013] In a second aspect, an exposure device includes: an acquisition module configured to acquire heart rate data of an object to be exposed and an exposure period; a selection module configured to select an exposure mode corresponding to the heart rate data according to the heart rate data; and an exposure module configured to perform medical exposure on the object to be exposed according to the exposure mode and the exposure period.

[0014] In a third aspect, an electronic device includes a memory and a processor, the memory stores a computer program, and the processor is configured to execute the computer program to perform any of the exposure methods described above.

[0015] In a fourth aspect, a storage medium stores a computer program, and the computer program is configured to perform any of the exposure methods described above when executed.

[0016] Compared with the related art, the exposure method, the medical imaging system, the electronic device and the storage medium provided by the embodiments of the present application can acquire heart rate data of an object to be exposed and an exposure period, determine a corresponding exposure mode according to the heart rate data, and finally perform exposure on the object to be exposed according to the exposure mode and the exposure period. The heart rate condition of the object to be exposed is determined according to the heart rate data, and then corresponding scanning is performed. Therefore, the object to be scanned with abnormal heart rate and the object to be scanned with normal heart rate can be scanned, and the scanning accuracy is improved.

[0017] The 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

[0018] The accompanying drawings illustrated herein are used to provide further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0019] Figure 1 Fig. 1 is a hardware structure block diagram of a terminal of an exposure method according to an embodiment of the present application;

[0020] Figure 2a Fig. 2 is an exposure schematic diagram of a to-be-exposed object with normal heart rate condition according to an embodiment of the present application;

[0021] Figure 2b Fig. 3 is an exposure schematic diagram of a to-be-exposed object with abnormal heart rate according to an embodiment of the present application;

[0022] Figure 3 Fig. 4 is a flowchart of an exposure method according to an embodiment of the present application;

[0023] Figure 4 Fig. 5 is an exposure schematic diagram of a first heart rate mode according to an embodiment of the present application;

[0024] Figure 5 Fig. 6 is an exposure schematic diagram of a second exposure mode according to an embodiment of the present application;

[0025] Figure 6 Fig. 7 is an exposure schematic diagram of a third exposure mode according to an embodiment of the present application;

[0026] Figure 7 Fig. 8 is an abnormal heart rate mode schematic diagram according to an embodiment of the present application;

[0027] Figure 8 Fig. 9 is a structure block diagram of an exposure device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and explained below in conjunction with the accompanying drawings and embodiments.

[0029] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as those commonly understood by a person of ordinary skill in the art to which the present application belongs. The terms "one", "a", "an", "the", "these", and similar terms in the present application do not indicate quantity of limitation, and they can be singular or plural. The terms "include", "contain", "have", and any variants thereof in the present application are intended to cover non-exclusive inclusion; for example, a process, method, and system, product or device containing a series of steps or modules (units) are not limited to the listed steps or modules (units), but can include steps or modules (units) not listed, or can include other steps or modules (units) inherent to the process, method, product or device. The terms "connect", "connected", "couple" and similar terms in the present application are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. The term "multiple" in the present application refers to two or more. The term "and / or" describes the association between the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that A exists alone, A and B exist together, and B exists alone. Generally, the character " / " represents an "or" relationship between the associated objects. The terms "first", "second", "third" and the like in the present application are only used to distinguish similar objects, and do not represent a specific order of the objects.

[0030] The method embodiments provided in the present embodiment can be executed in a terminal, a computer or a similar computing device. For example, the method embodiments are executed on a terminal, Figure 1 is a hardware structure diagram of the terminal of the exposure method of the present embodiment. As shown in Figure 1 , the terminal can include one or more (only one is shown in Figure 1 ) processor 102 and memory 104 for storing data, wherein the processor 102 can include but not limited to processing devices such as microprocessor MCU or programmable logic device FPGA. The above terminal can also include a transmission device 106 for communication function and an input / output device 108. Those skilled in the art can understand that Figure 1 The structure shown is only schematic, which does not limit the structure of the above terminal. For example, the terminal can include more or less components than those shown in Figure 1 , or have a different configuration from that shown in Figure 1 .

[0031] The memory 104 can be used to store computer programs, such as software programs of application software and modules, such as a computer program corresponding to the exposure method in the embodiment, and the processor 102 can execute various functional applications and data processing, i.e., implement the method described above, by running the computer programs stored in the memory 104. The memory 104 can include a high-speed random access memory, and can further include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 104 can further include memories remotely arranged with respect to the processor 102, which can be connected to the terminal through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0032] The transmission device 106 is configured to receive or send data via a network. The network includes a wireless network provided by a communication provider of the terminal. In an example, the transmission device 106 includes a network interface controller (NIC) which can be connected to other network devices through a base station so as to communicate with the Internet. In an example, the transmission device 106 can be a radio frequency (RF) module configured to communicate with the Internet in a wireless manner.

[0033] CT forward heart scan, also known as sequence scan or axial scan, refers to that a scan process is triggered by an R wave of an ECG signal of a patient, at a preset time point after the R wave, usually at a diastolic period with the lowest heart rate, a radiation exposure and data acquisition are started, during the acquisition, the examination bed remains stationary, after the exposure and data acquisition are completed, the examination bed is moved to the next scan position, after the next triggered R wave appears, the scan is continued. The forward R wave position is obtained by averaging the last three R-R intervals, wherein the R-R interval refers to a time interval between two R waves on an electrocardiogram, the stepping and scanning are alternately performed until the entire volume data is acquired, and then the scan is completed.

[0034] The CT forward heart scan has a high requirement for the regularity of heart rate, and the scan process is very sensitive to cardiac motion artifacts. During the exposure process, once the heart rate is abnormal, the planned exposure time period cannot cover the desired phase of the physician, and then a mislayer artifact or a ladder artifact is easily generated, which leads to a failed scan, especially for patients with abnormal heart rate.

[0035] Please refer to Figure 2a and Figure 2b , Figure 2a is an exposure schematic diagram of a to-be-exposed object in a normal heart rate condition according to an embodiment of the present application, Figure 2bExposure diagram of the embodiment of the present application when the heart rate of the object to be exposed is abnormal. It can be seen that, Figure 2a In the embodiment, the expected coverage phase is 30%-70%, and the actual coverage phase is also 30%-70%; and Figure 2b In the embodiment, R3 comes earlier than expected due to arrhythmia, resulting in that the originally planned 30%-70% phase becomes 60%-120% phase, this exposure fails, the system interrupts the exposure, and the exposure can be re-planned based on R3 or R4, but the next scan may still exist similar arrhythmia, and finally leads to the failure of the scan.

[0036] Please refer to Figure 3 , Figure 3 Flowchart of the exposure method of the embodiment of the present application.

[0037] In the embodiment, the exposure method comprises:

[0038] S301, acquiring heart rate data of the object to be exposed and an exposure period.

[0039] Exemplarily, according to the heart rate data of the object to be exposed, the heart rate type of the object to be exposed can be determined, the heart rate type is classified according to whether the heart rate of the object to be exposed is abnormal, and the exposure period is a planned exposure period planned based on the normal heart rate of the object to be exposed. In the case that the heart rate of the patient is normal, exposure is performed according to the planned exposure period, which can cover the expected scan phase.

[0040] S302, selecting an exposure mode corresponding to the heart rate data according to the heart rate data.

[0041] It can be understood that when the heart rate is abnormal, if the scan is still normally performed, the planned exposure time period cannot cover the expected phase of the doctor, and then false layer artifacts or ladder-shaped artifacts are easily generated, which leads to the failure of the scan. Therefore, the degree of arrhythmia of the patient needs to be determined according to the heart rate data, and the corresponding exposure mode needs to be designed for exposure, so as to achieve good exposure effect.

[0042] S303, exposing the object to be exposed according to the exposure mode and the exposure period.

[0043] Exemplarily, different heart rate data corresponds to different heart rate types, and different exposure modes need to be used to expose the object to be exposed. Different exposure modes only adjust the exposure range according to the heart rate type of the object to be exposed, so that the exposure can cover the expected phase and achieve better exposure effect, but do not adjust the exposure period.

[0044] The exposure method can obtain heart rate data of the object to be exposed and an exposure period, determine a corresponding exposure mode according to the heart rate data, and expose the object to be exposed according to the exposure mode and the exposure period. The heart rate of the object to be exposed is determined according to the heart rate data, and then corresponding scanning is performed. Therefore, the object to be scanned with abnormal heart rate or normal heart rate can be scanned, and the scanning accuracy is improved.

[0045] In another embodiment, the obtaining of the heart rate data of the object to be exposed and the exposure period comprises the following steps:

[0046] Step 1: obtaining an electrocardiosignal of the object to be exposed;

[0047] Step 2: counting a number of times of heart rate abnormalities of the object to be exposed in a preset time range according to the electrocardiosignal;

[0048] Step 3: obtaining a heart rate type of the object to be exposed according to the number of times of heart rate abnormalities.

[0049] The heart rate type comprises a first heart rate type and a second heart rate type.

[0050] The number of times of heart rate abnormalities in the preset time range of the first heart rate type is less than the number of times of heart rate abnormalities in the preset time range of the second heart rate type.

[0051] It can be understood that, in the embodiment, the heart rate abnormalities are arrhythmia. In other embodiments, other heart rate abnormalities can be used, which are not limited herein.

[0052] Exemplarily, a forward-looking heart scan requires higher regularity of heart rate, and therefore the heart rate condition of the object to be exposed is classified according to the regularity of heart rate. In the embodiment, the number of times of heart rate abnormalities in a preset time range is used as a classification standard to classify the heart rate condition of the object to be exposed. It can be understood that, in other embodiments, other indexes reflecting the regularity of heart rate can be used as the classification standard, which is not limited herein.

[0053] In the embodiment, the first heart rate type can represent a relatively regular heart rate condition, i.e., a normal heart rate condition, and the second heart rate type can represent a relatively chaotic heart rate condition, i.e., an abnormal heart rate condition. It can be understood that the normal heart rate condition and the abnormal heart rate condition are exposed by using corresponding exposure modes. In other embodiments, the abnormal heart rate condition can be further classified according to the chaotic condition of the heart rate and actual needs, which is not limited herein.

[0054] In another embodiment, the heart rate type further comprises a third heart rate type, and the number of times of heart rate abnormalities in the preset time range of the second heart rate type is less than the number of times of heart rate abnormalities in the preset time range of the third heart rate type.

[0055] In the embodiment, the number of times of heart rate abnormalities in the first heart rate type preset time range is less than the number of times of heart rate abnormalities in the second heart rate type preset time range, and the number of times of heart rate abnormalities in the second heart rate type preset time range is less than the number of times of heart rate abnormalities in the third heart rate type preset time range. Therefore, the heart rate condition corresponding to the first heart rate type is the most regular, and the heart rate condition corresponding to the third heart rate type is the most chaotic. When adjusting the exposure mode, the exposure mode of the heart rate condition corresponding to the third heart rate type needs to be adaptively adjusted to a large extent, and the exposure mode of the heart rate condition corresponding to the first heart rate type needs to be adjusted to a small extent or not adjusted. Here, the adjustment is only a relative limitation, and the specific adjustment degree and adjustment mode are determined according to the actual heart rate condition.

[0056] In another embodiment, the first heart rate type represents a heart rate condition in which the number of times of heart rate abnormalities in 1 minute is less than once, the second heart rate type represents a heart rate condition in which the number of times of heart rate abnormalities in 1 minute is 2-3 times, and the third heart rate type represents a heart rate condition in which the number of times of heart rate abnormalities in 1 minute is more than 3 times. It can be understood that here is only a specific embodiment, and in actual application, the preset time, the judgment standard of the number of times of heart rate abnormalities in the preset time, and the number of heart rate types can be set by the user according to the actual situation.

[0057] In another embodiment, if the heart rate type is the first heart rate type, a first exposure mode is selected, and the medical exposure of the to-be-exposed object according to the exposure mode and the exposure period includes the following steps.

[0058] Step 1, exposing the to-be-exposed object based on the exposure period;

[0059] Step 2, stopping exposure if a heart rate abnormality is detected in the exposure period;

[0060] Step 3, exposing the to-be-exposed object again based on the exposure period until the exposure of the to-be-exposed object is completed in the exposure period.

[0061] In the embodiment, the heart rate condition corresponding to the first heart rate type is relatively regular, so the situation of heart rate abnormality is less, and the detection of heart rate abnormality is a small probability event. Therefore, only a normal strategy is needed, and the exposure is stopped when the heart rate abnormality is detected, and the exposure is performed again, so that the exposure can be normally completed, and the radiation dose will not be too high.

[0062] Please refer to Figure 4 , Figure 4Fig. 1 is a schematic diagram of exposure in a first heart rate mode according to an embodiment of the present application. After R2 is detected, the exposure range S1 is planned, after R3 is detected, it is found that R3 is a heart rate anomaly, the exposure of S1 is stopped immediately, a new exposure range S2 is planned based on R3 and the predicted R4', and if no heart rate anomaly occurs subsequently, the exposure is completed and valid reconstruction data is obtained. It can be understood that the heart rate condition corresponding to the first heart rate type is relatively regular, and the exposure success rate is relatively high, so the radiation dose is considered first, and when a heart rate anomaly is detected, the heart rate anomaly mode is not used for exposure, but the normal exposure strategy is used for re-exposure to reduce the radiation dose.

[0063] In another embodiment, if the heart rate type is a second heart rate type, a second exposure mode is selected; and the medical exposure of the object to be exposed according to the exposure mode and the exposure period includes the following steps:

[0064] Step 1, exposing the object to be exposed based on the exposure period;

[0065] Step 2, if a heart rate anomaly is detected within the exposure period, stopping the exposure;

[0066] Step 3, exposing the object to be exposed again based on the exposure period;

[0067] Step 4, if a heart rate anomaly is detected again within the exposure period, exposing the object to be exposed according to the heart rate anomaly mode.

[0068] In this embodiment, the heart rate condition corresponding to the second heart rate type has a certain irregularity, but it is not the most chaotic heart rate condition, so when a heart rate anomaly is detected for the first time, the exposure is stopped and the exposure is re-performed based on the exposure period, and the attempt is made again, if the heart rate condition is normal subsequently, the exposure is continued to be completed; if a heart rate anomaly is detected again within the exposure period, it is indicated that the normal exposure strategy cannot successfully complete the exposure, and the object to be exposed is exposed according to the preset heart rate anomaly mode to complete the exposure. It can be understood that the heart rate anomaly mode can use a method of prolonging the exposure time to cover a larger phase to achieve the effect of complete exposure, but it will cause the radiation dose to be too high, so when the heart rate type is the second heart rate type, in order to balance the exposure success rate and the radiation dose, when a heart rate anomaly occurs for the first time, the heart rate anomaly mode is not directly used for exposure, but the normal exposure strategy is used for re-exposure attempt.

[0069] Please refer to Figure 5 , Figure 5Fig. 3 is a schematic diagram of exposure in the second exposure mode according to an embodiment of the present application. After R2 is detected, the exposure range S1 is planned, and after R3 is detected, it is found that R3 is a heart rate anomaly, so the exposure of S1 is stopped immediately, a new exposure range S2 is planned based on R3 and the predicted R4', but during the exposure of S2, the heart rate anomaly R4 occurs again, so the exposure of S2 is not interrupted, and the exposure range S2 is updated to S3 directly, so that the exposure range covers 30% to 70% of the phase, and effective reconstruction data can be ensured.

[0070] In another embodiment, if the heart rate type is the third heart rate type, a third exposure mode is selected, and the medical exposure of the object to be exposed according to the exposure mode and the exposure period includes the following steps:

[0071] Step 1, exposing the object to be exposed based on the exposure period;

[0072] Step 2, if a heart rate anomaly is detected within the exposure period, exposing the object to be exposed according to the heart rate anomaly mode.

[0073] Exemplarily, the third heart rate type corresponds to the most chaotic heart rate condition, and there may be many heart rate anomalies, so when a heart rate anomaly is detected for the first time, the heart rate anomaly mode is converted for exposure to complete the exposure. It can be understood that after the first heart rate anomaly is encountered, if the normal exposure strategy is tried again, the heart rate anomaly is likely to occur again under the third heart rate type corresponding to the heart rate condition, and the failure again is likely to cause waste of radiation dose, so the heart rate anomaly mode is directly used for exposure to ensure the success rate of exposure.

[0074] Please refer to Figure 6 , Figure 6 Fig. 4 is a schematic diagram of exposure in the third exposure mode according to an embodiment of the present application. After R2 is detected, the exposure range S1 is planned, and after R3 is detected, it is found that R3 is a heart rate anomaly, so the exposure of S2 is not interrupted, and the exposure range S2 is updated to S3 directly, so that the exposure range covers 30% to 70%, and effective reconstruction data can be ensured, and the success rate is effectively improved.

[0075] It can be understood that the above embodiments all set the expected coverage phase to 30% to 70%, that is, 30% to 70% of the exposure coverage phase is considered to complete the exposure, and in other embodiments, the expected coverage phase can be set according to actual conditions.

[0076] In another embodiment, exposing the object to be exposed according to the heart rate anomaly mode includes the following steps:

[0077] Step 1, obtaining the heartbeats before a preset number of times before the current exposure period, and the initial exposure time and the end exposure time of the current exposure period;

[0078] Step 2, obtaining the single rotation time of the exposure device rack;

[0079] Step 3, calculating the minimum exposure time according to the single rotation time, the initial exposure time and the end exposure time;

[0080] Step 4, calculating the maximum exposure time according to the heartbeats before a preset number of times, the initial exposure time and the end exposure time;

[0081] Step 5, real-time detecting R wave information, and completing the exposure of the object to be exposed according to the R wave information, the initial exposure time, the minimum exposure time and the maximum exposure time.

[0082] It can be understood that based on the R wave information, the initial exposure time, the minimum exposure time and the maximum exposure time, it can be judged how to set the exposure range to cover the expected phase in the case of abnormal heart rate to complete the exposure and collect effective reconstruction data. In other embodiments, other related parameters can also be obtained, and other exposure modes can be used as the abnormal heart rate mode, as long as the expected phase is covered in the case of abnormal heart rate to complete the exposure and collect effective reconstruction data.

[0083] Please refer to Figure 7 , Figure 7 is a schematic diagram of an embodiment of the present application. Exemplarily, Tstart is the exposure start time when there is no heart rate abnormality, i.e. the initial time of exposure, Tend is the exposure end time when there is no heart rate abnormality, i.e. the end time of a cycle when exposure is performed according to a normal exposure strategy, RN represents the Nth RTag, i.e. the Nth heartbeat, which may be abnormal, Td1 is the minimum exposure time after the occurrence of heart rate abnormality, and Td2 is the maximum exposure time after the occurrence of heart rate abnormality. Specifically, Td1 can be the larger value of the time of multiple rotations of the rack and the exposure time when there is no heart rate abnormality, i.e. max (single rotation time of the rack * N, Tend-Tstart), wherein the number of rotations of the rack can be set according to actual conditions, as long as it can collect enough reconstruction data; Td2 can be max (Td1, Tend, Min (2s, max (1s, max (recent N heartbeats))), wherein N can be set according to actual conditions, but should not be too large to ensure the timeliness of the heartbeat data, and preferably, N can be any value in 3-10.

[0084] In another embodiment, the R-wave information is detected in real time, and the exposure of the object to be exposed is completed according to the R-wave information, the initial exposure time, the minimum exposure time and the maximum exposure time, and includes the following steps:

[0085] Step 1, if two R-waves are detected within the initial exposure time and the minimum exposure time, the exposure of the object to be exposed is completed at the minimum exposure time;

[0086] Step 2, if two R-waves are detected within the initial exposure time and the maximum exposure time, and the time of the second R-wave is within the minimum exposure time and the maximum exposure time, the exposure of the object to be exposed is completed at the time of the second R-wave is detected;

[0087] Step 3, if two R-waves are not detected within the initial exposure time and the maximum exposure time, the exposure of the object to be exposed is completed at the maximum exposure time.

[0088] Exemplarily, if the exposure is performed in the heart rate abnormal mode, on the basis of the planned exposure range S1, a new exposure end time Tstart+Td2 is updated, that is, from the exposure start time, a maximum exposure time calculated is taken as the end time; it is waited until the time Tstart+Td1, that is, from the exposure start time, a minimum exposure time calculated is taken, and it is checked whether 2 Rtags appear within Tstart~Tstart+Td1, if 2 Rtags have appeared, it is proved that Tstart~Tstart+Td1 has covered a complete cardiac cycle, and the obtained data can obtain a high-quality image, and the exposure is immediately stopped; if 2 Rtags do not appear within Tstart~Tstart+Td1, it is checked whether 2 Rtags appear within Tstart~Tstart+Td2, if 2 Rtags appear, and the time of the second Rtag is within Tstart+Td1~Tstart+Td2, the exposure of the object to be exposed is completed at the time of the second Rtag is detected; if 2 Rtags do not appear at all, the exposure is ended at Tstart+Td2.

[0089] It should be noted that the steps shown in the above flow or the flowchart of the accompanying drawings can be executed in a computer system such as a group of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0090] In this embodiment, a medical imaging system is also provided, characterized in that it comprises a medical imaging device having an exposure function, an electrocardiosignal monitoring device and a processor, wherein:

[0091] The electrocardiosignal monitoring device is configured to acquire heart rate data of the to-be-exposed object and an exposure period;

[0092] The electrocardiosignal monitoring device is further configured to:

[0093] acquire an electrocardiosignal of the to-be-exposed object;

[0094] count a number of times of heart rate abnormalities of the to-be-exposed object in a preset time range according to the electrocardiosignal;

[0095] obtain a heart rate type of the to-be-exposed object according to the number of times of heart rate abnormalities;

[0096] The heart rate type includes a first heart rate type and a second heart rate type.

[0097] The number of times of heart rate abnormalities in the preset time range of the first heart rate type is less than the number of times of heart rate abnormalities in the preset time range of the second heart rate type.

[0098] The processor is configured to select an exposure mode corresponding to the heart rate data according to the heart rate data.

[0099] The medical imaging device is configured to expose the to-be-exposed object according to the exposure mode and the exposure period.

[0100] The medical imaging device is further configured to:

[0101] expose the to-be-exposed object based on the exposure period;

[0102] if the heart rate abnormality is detected in the exposure period, stop the exposure;

[0103] based on the exposure period, expose the to-be-exposed object again until the exposure of the to-be-exposed object is completed in the exposure period.

[0104] The medical imaging device is further configured to:

[0105] expose the to-be-exposed object based on the exposure period;

[0106] if the heart rate abnormality is detected in the exposure period, stop the exposure;

[0107] based on the exposure period, expose the to-be-exposed object again;

[0108] if the heart rate abnormality is detected again in the exposure period, expose the to-be-exposed object according to the heart rate abnormality mode.

[0109] The medical imaging device is further configured to:

[0110] expose the to-be-exposed object based on the exposure period;

[0111] If the heart rate anomaly is detected in the exposure period, the exposure object is exposed according to the heart rate anomaly mode.

[0112] The medical imaging device is further configured to:

[0113] acquire a plurality of heart cycles within a preset number of times before a current exposure period and initial exposure time and end exposure time of the current exposure period;

[0114] acquire a single-turn rotation time of a gantry of the exposure device;

[0115] calculate a minimum exposure time according to the single-turn rotation time, the initial exposure time and the end exposure time;

[0116] calculate a maximum exposure time according to the plurality of heart cycles within the preset number of times, the initial exposure time and the end exposure time;

[0117] detect R wave information in real time, and complete exposure of the exposure object according to the R wave information, the initial exposure time, the minimum exposure time and the maximum exposure time.

[0118] The medical imaging device is further configured to:

[0119] if two R waves are detected from the initial exposure time to the minimum exposure time, exposure of the exposure object is completed at the minimum exposure time;

[0120] if two R waves are detected from the initial exposure time to the maximum exposure time, and the time of the second R wave is within the minimum exposure time to the maximum exposure time, exposure of the exposure object is completed at the time of the second R wave;

[0121] if two R waves are not detected from the initial exposure time to the maximum exposure time, exposure of the exposure object is completed at the maximum exposure time.

[0122] The embodiment also provides an exposure device for implementing the above-mentioned embodiments and preferred embodiments, which has been described above. The terms "module", "unit", "sub-unit" and the like used below 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 is conceived.

[0123] Figure 8 is a structural block diagram of the exposure device of the embodiment, as Figure 8 shown, the device comprises:

[0124] an acquisition module 10 configured to acquire heart rate data of an exposure object and an exposure period.

[0125] The acquisition module 10 is also configured to:

[0126] acquire an electrocardio signal of the to-be-exposed object;

[0127] count a number of times of heart rate abnormalities of the to-be-exposed object in a preset time range according to the electrocardio signal;

[0128] obtain a heart rate type of the to-be-exposed object according to the number of times of heart rate abnormalities.

[0129] The heart rate type includes a first heart rate type and a second heart rate type.

[0130] The number of times of heart rate abnormalities in the preset time range of the first heart rate type is less than the number of times of heart rate abnormalities in the preset time range of the second heart rate type.

[0131] The selection module 20 is configured to select an exposure mode corresponding to the heart rate data according to the heart rate data.

[0132] The exposure module 30 is configured to perform medical exposure on the to-be-exposed object according to the exposure mode and an exposure period.

[0133] The exposure module 30 is also configured to:

[0134] expose the to-be-exposed object based on the exposure period;

[0135] stop the exposure if the heart rate abnormality is detected in the exposure period;

[0136] expose the to-be-exposed object again based on the exposure period until the exposure on the to-be-exposed object is completed in the exposure period.

[0137] The exposure module 30 is also configured to:

[0138] expose the to-be-exposed object based on the exposure period;

[0139] stop the exposure if the heart rate abnormality is detected in the exposure period;

[0140] expose the to-be-exposed object again based on the exposure period;

[0141] expose the to-be-exposed object according to the heart rate abnormality mode if the heart rate abnormality is detected again in the exposure period.

[0142] The exposure module 30 is also configured to:

[0143] expose the to-be-exposed object based on the exposure period;

[0144] expose the to-be-exposed object according to the heart rate abnormality mode if the heart rate abnormality is detected in the exposure period.

[0145] The exposure module 30 is further configured to:

[0146] obtain the heart cycle within a preset number of times before a current exposure period and initial exposure time and end exposure time of the current exposure period;

[0147] obtain a single-turn rotation time of a gantry of the exposure device;

[0148] calculate a minimum exposure time according to the single-turn rotation time, the initial exposure time and the end exposure time;

[0149] calculate a maximum exposure time according to the heart cycle within the preset number of times, the initial exposure time and the end exposure time;

[0150] detect R wave information in real time, and complete exposure of the to-be-exposed object according to the R wave information, the initial exposure time, the minimum exposure time and the maximum exposure time.

[0151] The exposure module 30 is further configured to:

[0152] if two R waves are detected within the initial exposure time to the minimum exposure time, exposure of the to-be-exposed object is completed at the minimum exposure time;

[0153] if two R waves are detected within the initial exposure time to the maximum exposure time, and the time of the second R wave is within the minimum exposure time to the maximum exposure time, exposure of the to-be-exposed object is completed at the time of the second R wave;

[0154] if two R waves are not detected within the initial exposure time to the maximum exposure time, exposure of the to-be-exposed object is completed at the maximum exposure time.

[0155] 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 also be located in different processors in any combination.

[0156] In this embodiment, an electronic device is also provided, including a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any of the above method embodiments.

[0157] Optionally, the electronic device can further include a transmission device and an input / output device, wherein the transmission device is connected with the processor, and the input / output device is connected with the processor.

[0158] Optionally, in this embodiment, the processor can be configured to execute the following steps through the computer program:

[0159] acquire heart rate data of the object to be exposed and an exposure period;

[0160] select an exposure mode corresponding to the heart rate data according to the heart rate data;

[0161] expose the object to be exposed according to the exposure mode and the exposure period.

[0162] 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 will not be described herein again.

[0163] In addition, in combination with the exposure method provided in the above embodiments, a storage medium can also be provided in the embodiment to implement. The storage medium has a computer program stored thereon; the computer program is executed by a processor to implement any one of the exposure methods in the above embodiments.

[0164] It should be understood that the specific embodiments described herein are only used to explain this application, but not to limit it. According to the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0165] Obviously, the drawings are only some examples or embodiments of the present application, and those of ordinary skill in the art can also apply the present application to other similar situations without creative labor. In addition, it can be understood that although the work done in the development process may be complex and long, some design, manufacture or production changes made by those of ordinary skill in the art according to the technical content disclosed in the present application are only routine technical means and should not be regarded as insufficient disclosure of the present application.

[0166] The word "embodiment" in the present application means that the specific features, structures or characteristics described in combination with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor does it mean independence or alternative to other embodiments. Those of ordinary skill in the art can clearly or implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict.

[0167] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the patent protection scope. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An exposure method, characterized in that, include: Obtain the heart rate data and exposure period of the subject to be exposed; Based on the heart rate data, select the exposure mode corresponding to the heart rate data; The exposure mode includes a second exposure mode, which is applied to a second heart rate type; The number of times the heart rate abnormality occurred within the preset time range of the second heart rate type is greater than the number of times the heart rate abnormality occurred within the preset time range of the first heart rate type; Expose the object to be exposed according to the exposure mode and exposure cycle; If the exposure mode is the second exposure mode, then the step of exposing the object to be exposed according to the exposure mode and the exposure period includes: Expose the object to be exposed based on the exposure cycle; If an abnormal heart rate is detected during the exposure cycle, the exposure is stopped; Based on the exposure cycle, expose the object to be exposed again; If a heart rate abnormality is detected again during the exposure period, the object to be exposed is exposed according to the heart rate abnormality pattern; the heart rate abnormality pattern is used to extend the exposure time.

2. The exposure method according to claim 1, characterized in that, The acquisition of the heart rate data of the object to be exposed and the exposure period includes: Acquire the electrocardiogram (ECG) signal of the object to be exposed; Based on the electrocardiogram signal, count the number of times the heart rate abnormality occurred in the object to be exposed within a preset time range; Based on the number of abnormal heart rates, the heart rate type of the object to be exposed is obtained; The heart rate types include: a first heart rate type and a second heart rate type.

3. The exposure method according to claim 2, characterized in that, If the heart rate type is the first heart rate type, then select the first exposure mode; Exposure of the object to be exposed according to the exposure mode and exposure cycle includes: Expose the object to be exposed based on the exposure cycle; If an abnormal heart rate is detected during the exposure cycle, the exposure is stopped; Based on the exposure cycle, the object to be exposed is exposed again until the exposure of the object to be exposed is completed within the exposure cycle.

4. The exposure method according to claim 2, characterized in that, The heart rate type also includes a third heart rate type, wherein the number of times the heart rate abnormality occurs within the preset time range of the second heart rate type is less than the number of times the heart rate abnormality occurs within the preset time range of the third heart rate type; If the heart rate type is the third heart rate type, then select the third exposure mode; Medical exposure of the object to be exposed, based on the exposure mode and exposure cycle, includes: Expose the object to be exposed based on the exposure cycle; If a heart rate abnormality is detected during the exposure period, the object to be exposed is exposed according to the heart rate abnormality pattern.

5. The exposure method according to claim 4, characterized in that, The process of exposing the object to be exposed based on the abnormal heart rate pattern includes: Get the heartbeat cycles within the preset number of cycles before the current exposure cycle, as well as the initial exposure time and the end exposure time of the current exposure cycle; Obtain the rotation time of a single revolution of the exposure equipment gantry; Calculate the minimum exposure time based on the single-turn rotation time, initial exposure time, and end exposure time; The maximum exposure time is calculated based on the cardiac cycle, initial exposure time, and end exposure time within a preset number of exposures. The R-wave information is detected in real time, and the exposure of the object to be exposed is completed based on the R-wave information, the initial exposure time, the minimum exposure time, and the maximum exposure time.

6. The exposure method according to claim 5, characterized in that, The real-time detection of R-wave information, and the completion of the exposure of the object to be exposed based on the R-wave information, initial exposure time, minimum exposure time, and maximum exposure time, includes: If two R-waves are detected between the initial exposure time and the minimum exposure time, the exposure of the object to be exposed is completed within the minimum exposure time. If two R-waves are detected between the initial exposure time and the maximum exposure time, and the time of the second R-wave falls between the minimum exposure time and the maximum exposure time, then the exposure of the object to be exposed is completed at the time the second R-wave is detected. If no two R-waves are detected between the initial exposure time and the maximum exposure time, the exposure of the object to be exposed is completed at the maximum exposure time.

7. A medical imaging system, characterized in that, This includes medical imaging equipment with exposure capabilities, electrocardiogram signal monitoring equipment, and a processor, among which: The electrocardiogram signal monitoring device is used to acquire the heart rate data of the object to be exposed and the exposure period; The processor is configured to select an exposure mode corresponding to the heart rate data based on the heart rate data; the exposure mode includes a second exposure mode, which is applied to a second heart rate type; the number of times heart rate abnormalities occur within a preset time range for the second heart rate type is greater than the number of times heart rate abnormalities occur within a preset time range for the first heart rate type. The medical imaging device is used to expose the object to be exposed according to the exposure mode and exposure cycle; If the exposure mode is the second exposure mode, the medical imaging device is also used to expose the object to be exposed based on the exposure cycle; If an abnormal heart rate is detected during the exposure cycle, the exposure is stopped; Based on the exposure cycle, expose the object to be exposed again; If a heart rate abnormality is detected again during the exposure period, the object to be exposed is exposed according to the heart rate abnormality pattern; the heart rate abnormality pattern is used to extend the exposure time.

8. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the exposure method according to any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the exposure method according to any one of claims 1 to 6 when it is run.

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