Control Method, Device and Computer Equipment for Radiation Dose in Heart Scanning

Abstract

The present application relates to a method, apparatus, and computer device for controlling the radiation dose of a cardiac scan. Among them, the method includes: obtaining the average interval of the electrocardiogram signal and the heart rate interval between two adjacent Rtags within the target time zone; the average interval is determined by the heart rate interval; before the scan, according to the average interval and the heart rate interval, avoid misdetection or missed detection of Rtags within the target time zone; and / or, during the scan, based on the heart rate interval, control the poor Rtags during the scan. Through the present application, the problem that directly triggering re-planning of wire placement due to misdetection or missed detection of Rtags during the scan results in too long wire placement time and excessive introduction of radiation dose is solved, and the triggering probability of re-scanning is reduced to reduce the radiation dose received by the scanned object.

Description

Technical Field

[0001] This application relates to the field of medical imaging technology, and particularly to a method, device, and computer equipment for controlling the radiation dose in cardiac scanning. Background Art

[0002] With the development of medical imaging technology, medical imaging is widely implemented on patients through various medical imaging devices in clinical practice for diagnosis and treatment. When the heart beats, as the myocardium polarizes and depolarizes, there are slight electrocardiogram differences in different parts of the heart. Usually, electrocardiogram signals are detected by a three-lead or four-lead measurement method, and these electrocardiogram signals reflect the working state of the heart. After an electrocardiogram (ECG) signal is detected by a Computed Tomography (CT) system, a waveform of the electrocardiogram signal is generated and an R tag is marked to guide a doctor in performing a cardiac scan. Generally, the desired radiation area for cardiac scanning is the quiescent period of the heart, that is, within the time zone range between two R tags. The duration between two R tags is denoted as the RR Interval.

[0003] The current solution is as follows: Planning for radiation starts directly based on the RR Interval. During the cardiac scanning process, due to other factors such as overly dry skin of the subject, muscle movement of the subject, on-site equipment problems, and noise interference, there may be cases of missed detection or false detection of the R tag. This will result in a mismatch between the actual radiation time planned and the cardiac cycle of the subject, and affect the quality of cardiac scanning. At this time, the radiation will be stopped and the radiation plan will be re-planned, resulting in an overly long radiation time and excessive radiation dose.

[0004] Regarding the problem in the related technology that there are cases of missed detection or false detection of the R tag, directly triggering re-planning of radiation, resulting in an overly long radiation time and excessive radiation dose, no effective solution has been proposed yet. Summary of the Invention

[0005] In this embodiment, a method, device, and computer equipment for controlling the radiation dose in cardiac scanning are provided to solve the problem in the related technology that there are cases of missed detection or false detection of the R tag, directly triggering re-planning of radiation, resulting in an overly long radiation time and excessive radiation dose.

[0006] In a first aspect, in this embodiment, a method for controlling the radiation dose during cardiac scanning is provided, including:

[0007] Obtaining the average interval of the electrocardiogram signal and the heart rate interval between two adjacent R tags within the target time zone; the average interval is determined by the heart rate interval;

[0008] Before scanning, based on the average interval and the heart rate interval, avoid false detection or missed detection of Rtag in the target time zone;

[0009] And / or, during scanning, based on the heart rate interval, control poor Rtag during scanning.

[0010] In some embodiments, the step of before scanning, based on the average interval and the heart rate interval, avoiding false detection or missed detection of Rtag in the target time zone includes:

[0011] Before scanning, based on a preset judgment rule, according to the average interval and the heart rate interval, judge whether there is false detection or missed detection of Rtag in the target time zone;

[0012] When there is no false detection or missed detection of Rtag in the target time zone, mark the heart rate interval in the target time zone with a trusted identifier;

[0013] When there is false detection or missed detection of Rtag in the target time zone, mark the heart rate interval in the target time zone with an untrusted identifier.

[0014] In some embodiments, the step of before scanning, based on a preset judgment rule, according to the average interval information and the heart rate interval information, judge whether there is false detection or missed detection of Rtag in the target time zone includes:

[0015] Before scanning, compare the difference between the average interval information and the heart rate interval information with a preset judgment threshold, and judge whether there is false detection or missed detection of Rtag in the target time zone according to the comparison result; the preset judgment threshold is determined by the average interval information;

[0016] If the difference is greater than the first judgment threshold in the preset judgment threshold, and the heart rate interval information is greater than the second judgment threshold, it is judged that there is a missed detection of Rtag in the target time zone;

[0017] If the difference is greater than the first judgment threshold in the preset judgment threshold, and the heart rate interval information is less than the third judgment threshold, it is judged that there is a false detection of Rtag in the target time zone.

[0018] In some embodiments, the method further includes:

[0019] After marking the heart rate interval in the target time zone with an untrusted identifier, select a new target time zone to re-judge whether there is false detection or missed detection of Rtag in the selected new target time zone.

[0020] In some embodiments, the method further includes:

[0021] At the start of scanning, determine whether the heart rate interval in the target time zone is reliable;

[0022] If the heart rate interval in the target time zone has a reliable identification, then the heart rate interval in the target time zone is reliable, and continue scanning;

[0023] If the heart rate interval in the target time zone does not have a reliable identification, then the heart rate interval in the target time zone is not reliable, select a new target time zone, and continue to determine whether the heart rate interval in the new target time zone is reliable.

[0024] In some of the embodiments, during the scanning process, based on the heart rate interval, control the poor Rtag during the scanning process, including:

[0025] Use a heart rate conversion formula to determine the heart rate value based on the heart rate interval information;

[0026] When the heart rate value does not meet the preset heart rate threshold, then based on a preset scanning strategy, control the continuous scanning or rescan during the scanning process.

[0027] In some of the embodiments, the control of the continuous scanning or stop scanning during the scanning process based on a preset scanning strategy includes:

[0028] In the intelligent planning mode;

[0029] If the heart rate value is always lower than the preset heart rate threshold, then uniformly use the preset heart rate threshold to determine the heart rate interval information to complete the planned wire laying;

[0030] Or, if the heart rate value is lower than the preset heart rate threshold, then rescan.

[0031] In a second aspect, in the present embodiment, a control device for the radiation dose during a cardiac scan is provided, including: an acquisition module, an avoidance module, and / or a control module;

[0032] The acquisition module is used to acquire the average interval of the electrocardiogram signal and the heart rate interval between two adjacent Rtags in the target time zone; the average interval is determined by the heart rate interval;

[0033] The avoidance module is used to avoid false detection or missed detection of Rtags in the target time zone before scanning according to the average interval and the heart rate interval;

[0034] The control module is used to control the poor Rtag during the scanning process based on the heart rate interval.

[0035] In a third aspect, a computer device is provided in this embodiment, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the control method for the radiation dose of cardiac scanning described in the first aspect above is implemented.

[0036] In a fourth aspect, a storage medium is provided in this embodiment, on which a computer program is stored. When the program is executed by a processor, the control method for the radiation dose of cardiac scanning described in the first aspect above is implemented.

[0037] Compared with the related art, in the control method, device, and computer device for the radiation dose of cardiac scanning provided in this embodiment, by obtaining the average interval of the electrocardiogram signal and the heart rate interval between two adjacent Rtags within the target time zone; the average interval is determined by the heart rate interval; before scanning, according to the average interval and the heart rate interval, avoid misdetection or missed detection of Rtags within the target time zone; it can avoid misdetection or missed detection of Rtags within the target time zone in advance before scanning, improve the accuracy of planning and beam setting, reduce the triggering probability of rescan, and reduce the radiation dose received by the scanned object; and / or, during the scanning process, based on the heart rate interval, control the poor Rtags during the scanning process; further monitor the inappropriate beam setting during the scanning process, thereby reducing the radiation dose received by the scanned object; solve the problem that due to misdetection or missed detection of Rtags during the scanning process, it directly triggers the re-planning of beam setting, resulting in too long beam setting time and excessive introduction of radiation dose.

[0038] Details of one or more embodiments of the present application are set forth in the following drawings and description, so that other features, objects, and advantages of the present application become more comprehensible. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0040] Figure 1 is a hardware structure block diagram of a terminal device for the control method of the radiation dose of cardiac scanning provided by an embodiment of the present application;

[0041] Figure 2 is a flowchart of the control method for the radiation dose of cardiac scanning provided by an embodiment of the present application;

[0042] Figure 3 is a flowchart of determining whether there is misdetection or missed detection of Rtags within the target time zone provided by an embodiment of the present application;

[0043] Figure 4It is a structural block diagram of a control device for the radiation dose of a cardiac scan provided by an embodiment of the present application.

[0044] In the figure: 210, acquisition module; 220, avoidance module; 230, control module. Detailed implementation manners

[0045] To more clearly understand the purpose, technical solution, and advantages of the present application, the present application will be described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0046] Unless otherwise defined, the technical terms or scientific terms involved in the present application shall have the general meaning understood by those with ordinary skills in the technical field to which the present application belongs. In the present application, words such as "a", "an", "one kind", "the", "these", etc. do not indicate a limitation in quantity, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in the present application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device including a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent in these processes, methods, products, or devices. The terms "connection", "coupling", "connected" and the like involved in the present application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in the present application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. Usually, the character " / " indicates that the objects associated before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in the present application are only used to distinguish similar objects and do not represent a specific sorting of the objects.

[0047] The method embodiments provided in this embodiment can be executed on a terminal, a computer, or a similar computing device. For example, running on a terminal Figure 1 is a hardware structural block diagram of a terminal for the method of controlling the radiation dose of a cardiac scan in this embodiment. As Figure 1 shown, the terminal may include one or more ( Figure 1 only one is shown in the figure) processors 102 and a memory 104 for storing data. Among them, the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA. The above terminal may also include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand, Figure 1The structure shown is only schematic and does not limit the structure of the above terminal. For example, the terminal may further include more or fewer components than those shown in Figure 1 or different configurations from those shown in Figure 1 .

[0048] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the control method of the radiation dose of cardiac scan in this embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements the above 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 memories. In some instances, the memory 104 may further include a memory remotely provided with respect to the processor 102, and these remote memories can be connected to the terminal through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and their combinations.

[0049] The transmission device 106 is used to receive or send data via a network. The above network includes a wireless network provided by the communication provider of the terminal. In one instance, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices through a base station and thus can communicate with the Internet. In one instance, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0050] In this embodiment, a control method for the radiation dose of cardiac scan is provided. Figure 2 is a flowchart of the control method for the radiation dose of cardiac scan in this embodiment, as shown in Figure 2 . The process includes the following steps:

[0051] Step S210, obtaining the average interval of the electrocardiogram signal and the heart rate interval between two adjacent Rtags within the target time zone; the average interval is determined by the heart rate interval;

[0052] Step S220, before scanning, avoiding misdetection or missed detection of Rtags within the target time zone according to the average interval and the heart rate interval;

[0053] Step S230, and / or, during scanning, controlling the poor Rtags during scanning based on the heart rate interval.

[0054] It should be noted that a medical imaging device is used to scan an object (heart) to obtain the waveform of the electrocardiogram signal for medical imaging. A normal electrocardiogram waveform consists of a P wave, a QRS complex, a T wave, etc. The activity state of the heart is reflected not only in the heart rate, but more importantly, through the P, ORS, and T waves in the electrocardiogram signal and their various parameters. As a bioelectric signal source, the signal intensity of the heart is necessarily directly related to the number of active cells and constitutes the action potential changes of the cells that make up the atria and ventricles. Among them, the P wave, QRS complex, and T wave are the most important characteristic waves, and the PR interval, QT interval, ST interval, etc. formed on their basis are the most important characteristic signals of the electrocardiogram, which can reflect whether there are lesions in the cardiac conduction system and the heart itself from multiple aspects.

[0055] The QRS complex reflects the potential change during the depolarization process of ventricular muscle. A typical QRS complex includes three closely connected waves. The first downward wave is called the Q wave (the one with low voltage is called the q wave), the first upward wave is called the R wave (the one with low voltage is called the r wave), and the wave downward following the R (or r) wave is called the S wave (the one with low voltage is called the s wave). These three waves are closely connected, with a total time not exceeding 0.1 second, and they are all waveforms reflecting ventricular excitation, so they are combined and called the QRS complex. Common QRS complexes may show various forms such as qRs, qR, Qr, RS, rS, QS, Rs types in different leads.

[0056] The T wave represents the potential change caused by the late repolarization process of ventricular muscle. Its direction is often the same as that of the R wave, and it can be inverted in some leads. It is a wave with relatively low voltage and long duration.

[0057] In this embodiment, the electrocardiogram signal obtained from the scanned object can be divided into multiple intervals through a preset search time window, and each interval is a target time zone. There may be multiple R waves in each target time zone; the R wave detection algorithm can be used to determine the position of the R wave in each target time zone, and the R wave position is also the Rtag. Generally, the R wave position in each target time is determined by the maximum sampling value. Then, the interval between two adjacent Rtags is determined as the heart rate interval. The heart rate interval can be represented by RRInterva.

[0058] Among them, the average interval is determined by the heart rate interval, and the average interval can be represented by Aver-RRInterval. The expression of the average interval is:

[0059]

[0060]

[0061] Wherein, Av r-RRIntercal represents the average interval; A-RRIntercal represents the heart rate interval with regular heart rate; NA-RRIntercal represents the heart rate interval with irregular heart rate; N represents the number of heart rate intervals in the target time zone; n represents the number of heart rate intervals with irregular heart rate in the target time zone; represents the median value of N average intervals.

[0062] In this embodiment, there are three schemes to reduce the radiation dose during cardiac scanning.

[0063] The first scheme is: before scanning, according to the average interval and the heart rate interval, avoid misdetection or missed detection of Rtag in the target time zone.

[0064] Since the current scheme directly starts planning the wire release based on RRInterval, if there is a missed detection or misdetection of Rtag, the wire release will stop and the wire release will be re-planned, resulting in too long wire release time and excessive introduction of radiation dose. In this embodiment, by avoiding misdetection or missed detection of Rtag in the target time zone before scanning, the accuracy of planning the wire release is improved, the triggering probability of re-scanning is reduced, and the radiation dose received by the scanned object is reduced.

[0065] The second scheme is: during scanning, based on the heart rate interval, control the poor Rtag during scanning.

[0066] Since the current scheme directly identifies it as an irregular heart rate when the Rtag is poor during scanning, triggering the re-scanning mechanism, resulting in too long wire release time and excessive introduction of radiation dose. In this embodiment, by controlling the poor Rtag during scanning based on the heart rate interval during scanning, the triggering probability of re-scanning is reduced, and the radiation dose received by the scanned object is reduced.

[0067] The third scheme is:

[0068] Before scanning, according to the average interval and the heart rate interval, avoid misdetection or missed detection of Rtag in the target time zone; and during scanning, based on the heart rate interval, control the poor Rtag during scanning. In this embodiment, during both before scanning and during scanning, the triggering probability of re-scanning can be reduced, and the radiation dose received by the scanned object can be reduced.

[0069] Therefore, through the above steps, the average interval of the electrocardiogram signal in the target time zone and the heart rate interval between two adjacent Rtags are obtained; the average interval is determined by the heart rate interval; before scanning, according to the average interval and the heart rate interval, false detection or missed detection of Rtags in the target time zone is avoided; it is possible to avoid false detection or missed detection of Rtags in the target time zone in advance before scanning, improve the accuracy of planned wire placement, reduce the triggering probability of rescan, and reduce the radiation dose received by the scanned object; and / or, during the scanning process, based on the heart rate interval, control the poor Rtags during the scanning process; further monitor inappropriate wire placement during the scanning process, thereby reducing the radiation dose received by the scanned object; solve the problem that due to false detection or missed detection of Rtags during the scanning process, the wire placement is directly triggered to be replanned, resulting in too long wire placement time and excessive radiation dose.

[0070] The above steps will be described in detail below:

[0071] In some of these embodiments, step S220 includes the following steps:

[0072] Step S221, before scanning, based on a preset judgment rule, according to the average interval and the heart rate interval, judge whether there is false detection or missed detection of Rtags in the target time zone;

[0073] Step S222, when there is no false detection or missed detection of Rtags in the target time zone, mark the heart rate interval in the target time zone with a trusted identifier;

[0074] Step S223, when there is false detection or missed detection of Rtags in the target time zone, mark the heart rate interval in the target time zone with an untrusted identifier.

[0075] Specifically, before scanning, that is, before starting the planned wire placement, first judge whether there is false detection or missed detection of Rtags in the target time zone; improve the reliability of the data on which the planned wire placement is based. Since X-rays are only irradiated on the object when the scanning starts, there will be a radiation dose. Therefore, avoiding false detection or missed detection of Rtags in the target time zone can reduce the radiation dose.

[0076] The preset judgment rule refers to a judgment threshold constructed based on the average interval. By judging the average interval and the heart rate interval with the judgment threshold constructed based on the average interval, it is possible to quickly judge whether there is false detection or missed detection of Rtags in the target time zone without introducing other parameters, improving the calculation efficiency.

[0077] After comparing the average interval and the heart rate interval with the judgment threshold constructed based on the average interval, when there is no false detection or missed detection of Rtag in the target time zone, the heart rate interval in the target time zone is marked with a credible identifier; for example, the identifier is: Believable RRInterval. When there is false detection or missed detection of Rtag in the target time zone, the heart rate interval in the target time zone is marked with a non-credible identifier; for example, the identifier is: Unsuitable RRInterval. At this time, a new target time zone can be selected, and then based on the preset judgment rule, according to the average interval and the heart rate interval, it is judged whether there is false detection or missed detection of Rtag in the new target time zone; this process is repeated until a target time zone without false detection or missed detection of Rtag is screened out, so as to avoid the target time zone with anomalies (false detection or missed detection of Rtag) and reduce the triggering probability of rescan.

[0078] In some of these embodiments, the method for controlling the cardiac scan radiation dose further includes the following steps:

[0079] At the start of the scan, it is judged whether the heart rate interval in the target time zone is credible;

[0080] If the heart rate interval in the target time zone has a credible identifier, the heart rate interval in the target time zone is credible and the scan continues;

[0081] If the heart rate interval in the target time zone does not have a credible identifier, the heart rate interval in the target time zone is not credible, a new target time zone is selected, and it is continued to judge whether the heart rate interval in the new target time zone is credible.

[0082] Specifically, it is judged by the identifier carried by the heart rate interval in the target time zone; for example, the identifier carried by the heart rate interval in the target time zone is Believable RRInterval; then it is considered that the heart rate interval in the target time zone is credible and the scan continues. The identifier carried by the heart rate interval in the target time zone is Unsuitable RRInterval; then it is considered that the heart rate interval in the target time zone is not credible, a new target time zone is selected, and it is continued to judge whether the heart rate interval in the new target time zone is credible until the heart rate interval in the selected new target time zone is credible; in this way, the accuracy of the predicted radiation emission time (exposure time) is ensured.

[0083] For another example, when calculating the RRInterval, if there is a missed detection or false detection in the first 6 RRIntervals (the wire laying duration is planned based on 6 RRIntervals during the scanning process), the RRIntervals in this target time zone are marked as Unsuitable RRIntervals. At the start of scanning, if an Unsuitable RRInterval is recognized, wait until a Believable RRInterval is recognized before starting the scanning, which can avoid the mismatch between the planned wire laying time and the patient's cardiac cycle caused by poor Rtag signal.

[0084] The following describes the specific process for determining whether there is a false detection or missed detection of Rtag in the target time zone:

[0085] In some of these embodiments, as Figure 3 shown, step S221 includes the following steps:

[0086] Step S321, before scanning, compare the difference between the average interval and the heart rate interval with a preset judgment threshold, and determine whether there is a false detection or missed detection of Rtag in the target time zone according to the comparison result; the preset judgment threshold is determined by the average interval;

[0087] Step S322, if the difference is greater than the first judgment threshold in the preset judgment threshold and the heart rate interval is greater than the second judgment threshold, determine that there is a missed detection of Rtag in the target time zone;

[0088] Step S323, if the difference is greater than the first judgment threshold in the preset judgment threshold and the heart rate interval is less than the third judgment threshold, determine that there is a false detection of Rtag in the target time zone.

[0089] Specifically, the judgment threshold includes a first judgment threshold, a second judgment threshold, and a third judgment threshold. The first judgment threshold, the second judgment threshold, and the third judgment threshold are all determined by the average interval. For example: the first judgment threshold is 20% of the average interval; the second judgment threshold is 120% of the average interval; the third judgment threshold is 80% of the average interval.

[0090] Based on the above judgment threshold, it can be considered that:

[0091] If RRInterval - (Aver - RRInterval) > Aver - RRInterval * 20% and RRInterval > Aver - RRInterval * (1 + 20%), it is determined that there is a missed detection of Rtag in the target time zone;

[0092] If RRInterval - (Aver - RRInterval) > Aver - RRInterval * 20%, and RRInterval < Aver - RRInterval(1 - 20%), it is determined that there is a misdetection of Rtag in the target time zone.

[0093] In this embodiment, it is possible to quickly determine the existence of missed detection or misdetection of Rtag in the target time zone, improving the overall scanning efficiency. In other embodiments, the first judgment threshold may be a preset comparison value, and there is no limitation on this.

[0094] In some of these embodiments, step S230 includes the following steps:

[0095] Step S231, using the heart rate conversion formula, determine the heart rate value based on the heart rate interval;

[0096] Step S232, when the heart rate value does not meet the preset heart rate threshold, control the continuous scanning or rescan of the scanning process based on the preset scanning strategy.

[0097] Specifically, the expression of the heart rate conversion formula is: HR = 60 * 1000 / RRInteval (unit: millisecond).

[0098] In the formula, HR represents the heart rate value; RRInteval represents the heart rate interval.

[0099] The preset heart rate threshold can be set by the user, generally using the normal lower limit heart rate as the heart rate threshold. Under normal circumstances, the normal heart rate is around 60 bpm, the general upper limit heart rate is 90 bpm, and the lower limit heart rate is 30 bpm; therefore, it can be considered that the heart rate threshold is 30 bpm; if the heart rate value is less than 30 bpm, it is considered that the current heart rate is too low, the heart rate value does not meet the preset heart rate threshold, and the continuous scanning or rescan of the scanning process is controlled based on the preset scanning strategy. Specifically, a pop-up prompt can be given to the user, and the user can confirm whether to continue scanning or rescan according to the specific scanning scenario; for example, after clicking OK, further scanning can be continued, and after clicking Cancel, rescan can be performed. This operation can intercept the possibility of too low heart rate rays from the beginning of the scanning, and can reduce the radiation dose. In other embodiments, the preset heart rate threshold can be other values, such as 28 bpm, 25 bpm, etc., and no further examples are given here.

[0100] In some of these embodiments, controlling the continuous scanning or stopping scanning of the scanning process based on the preset scanning strategy includes the following steps:

[0101] In the intelligent planning mode;

[0102] If the heart rate value is continuously lower than the preset heart rate threshold, the heart rate interval is uniformly determined by the preset heart rate threshold to complete the planned wire laying;

[0103] Or, if the heart rate value is lower than the preset heart rate threshold, rescan.

[0104] Specifically, if the user checks the intelligent planning mode option on the operation interface, then enter the intelligent planning mode, and continue scanning or rescan will be determined based on the heart rate value.

[0105] In one case, during the scanning process, if the heart rate value is continuously lower than the preset heart rate threshold, it is considered that the current heart rate value is an abnormal heart rate value, and scanning will continue. However, the heart rate interval will be calculated uniformly by the preset heart rate threshold (i.e., 30 bpm) to plan the wire laying, thereby shortening the wire laying time and reducing the radiation dose of the scanning.

[0106] In another case, during the scanning process, if the heart rate value is lower than the preset heart rate threshold, regardless of the difference between the heart rate threshold and the historical average heart rate, it is uniformly considered that arrhythmia has occurred during this scanning process (wire laying), and the rescan mechanism is directly triggered. This is to avoid calculating the heart rate interval with the Rtag of too low a heart rate to normally plan the wire laying during subsequent scanning, which may lead to an increase in the radiation dose. At the same time, if the subsequent heart rate is lower than the preset heart rate threshold, as the number of times of identifying arrhythmia increases, the allowed number of rescans will be quickly consumed and this round of wire laying will stop, so as to prevent the radiation dose introduced by subsequent further wire laying.

[0107] In this embodiment, by means of a pop-up prompt on the operation interface and checking the intelligent planning, the user can selectively control the process of planned wire laying, providing the possibility of choice.

[0108] It should be noted that the steps shown in the above process or 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 is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0109] In this embodiment, a control device for the radiation dose of cardiac scanning is also provided. This device is used to implement the above embodiment and the preferred implementation manner, and those that have been described will not be repeated. The following terms "module", "unit", "sub-unit", etc. can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0110] Figure 4 is the structural block diagram of the control device for the radiation dose of cardiac scanning in this embodiment, as Figure 4As shown, the device includes: an acquisition module 210, an avoidance module 220, and / or a control module 230;

[0111] The acquisition module 210 is configured to acquire the average interval of the electrocardiogram signal and the heart rate interval between two adjacent Rtags within the target time zone; the average interval is determined by the heart rate interval;

[0112] The avoidance module 220 is configured to avoid false detection or missed detection of Rtags within the target time zone based on the average interval and the heart rate interval before scanning;

[0113] The control module 230 is configured to control the poor Rtag during the scanning process based on the heart rate interval.

[0114] Through the above device, it is possible to avoid false detection or missed detection of Rtags within the target time zone before scanning; and / or, during the scanning process, control the poor Rtag based on the heart rate interval, reduce the triggering probability of rescan, and reduce the radiation dose received by the scanned object; solve the problem that due to false detection or missed detection of Rtags directly triggering re-planning of wire laying during the scanning process, resulting in too long wire laying time and excessive introduction of radiation dose.

[0115] In some embodiments, the avoidance module 220 is further configured to, before scanning, based on a preset judgment rule, judge whether there is false detection or missed detection of Rtags within the target time zone according to the average interval and the heart rate interval;

[0116] When there is no false detection or missed detection of Rtags within the target time zone, mark the heart rate interval in the target time zone with a trusted identifier;

[0117] When there is false detection or missed detection of Rtags within the target time zone, mark the heart rate interval in the target time zone with an untrusted identifier.

[0118] In some embodiments, the avoidance module 220 is further configured to, before scanning, compare the difference between the average interval information and the heart rate interval information with a preset judgment threshold, and judge whether there is false detection or missed detection of Rtags within the target time zone according to the comparison result; the preset judgment threshold is determined by the average interval information;

[0119] If the difference is greater than the first judgment threshold in the preset judgment threshold and the heart rate interval information is greater than the second judgment threshold, it is judged that there is a missed detection of Rtags within the target time zone;

[0120] If the difference is greater than the first judgment threshold in the preset judgment threshold and the heart rate interval information is less than the third judgment threshold, it is judged that there is a false detection of Rtags within the target time zone.

[0121] In some embodiments, Figure 4On this basis, it further includes a re-judgment module;

[0122] The re-judgment module is used to, after marking the heart rate intervals in the target time zone through the untrusted identifier, select a new target time zone to re-judge whether there is a misdetection or missed detection of Rtag in the selected new target time zone.

[0123] In some of these embodiments, on the Figure 4 basis, it further includes an identifier judgment module;

[0124] The identifier judgment module is used to judge whether the heart rate intervals in the target time zone are trustworthy when starting to scan;

[0125] If the heart rate intervals in the target time zone carry a trustworthy identifier, then the heart rate intervals in the target time zone are trustworthy, and continue scanning;

[0126] If the heart rate intervals in the target time zone do not carry a trustworthy identifier, then the heart rate intervals in the target time zone are untrustworthy, select a new target time zone, and continue to judge whether the heart rate intervals in the new target time zone are trustworthy.

[0127] In some of these embodiments, the control module 230 is further used to utilize a heart rate conversion formula to determine a heart rate value based on the heart rate interval information;

[0128] When the heart rate value does not meet a preset heart rate threshold, then based on a preset scanning strategy, control the continuous scanning or rescan of the scanning process.

[0129] In some of these embodiments, the control module 230 is further used in the intelligent planning mode;

[0130] If the heart rate value is always lower than the preset heart rate threshold, then uniformly use the preset heart rate threshold to determine the heart rate interval information to complete the planned wire laying;

[0131] Or, if the heart rate value is lower than the preset heart rate threshold, then rescan.

[0132] It should be noted that the above-mentioned various modules can be functional modules or program modules, and can be implemented either by software or by hardware. For the modules implemented by hardware, the above-mentioned various modules can be located in the same processor; or the above-mentioned various modules can also be located in different processors in any combination form.

[0133] In this embodiment, a computer device is further provided, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0134] Optionally, the above computer device may further include a transmission device and an input / output device, wherein the transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0135] Optionally, in this embodiment, the above processor may be configured to perform the following steps by a computer program:

[0136] S1. Obtain the average interval of the electrocardiogram signal and the heart rate interval between two adjacent Rtags in the target time zone; the average interval is determined by the heart rate interval;

[0137] S2. Before scanning, avoid misdetection or missed detection of Rtags in the target time zone according to the average interval and the heart rate interval;

[0138] S3. And / or, during the scanning process, control the poor Rtags during the scanning process based on the heart rate interval.

[0139] It should be noted that the specific examples in this embodiment may refer to the examples described in the above embodiment and the optional implementation manners, and will not be elaborated in this embodiment.

[0140] In addition, in combination with the method for controlling the radiation dose of cardiac scanning provided in the above embodiment, a storage medium may also be provided in this embodiment to implement it. A computer program is stored on the storage medium; when the computer program is executed by the processor, it implements any one of the methods for controlling the radiation dose of cardiac scanning in the above embodiment.

[0141] It should be understood that the specific embodiments described here are only used to explain this application, rather than 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 work fall within the protection scope of the present application.

[0142] Obviously, the drawings are only some examples or embodiments of the present application. For those of ordinary skill in the art, the present application can also be applied to other similar situations according to these drawings without creative work. In addition, it can be understood that although the work done during this development process may be complex and time-consuming, for those of ordinary skill in the art, certain design, manufacturing, or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be regarded as insufficient disclosure of the present application.

[0143] As used in this application, the term "embodiment" means that the specific features, structures or characteristics described in connection with an embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily mean the same embodiment, nor does it mean that it is independent or alternative to other embodiments and mutually exclusive. Those of ordinary skill in the art can clearly or implicitly understand that the embodiments described in this application can be combined with other embodiments without conflict.

[0144] The above-described embodiments merely represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of patent protection. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all fall within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the appended claims.

Claims

1. A method for controlling the radiation dose of a cardiac scan, characterized in that Including: Obtaining the average interval of the electrocardiogram signal in the target time zone and the heart rate interval between two adjacent Rtags; The average interval is determined by the heart rate interval; Before scanning, according to the average interval and the heart rate interval, avoiding misdetection or missing detection of Rtags in the target time zone, which includes: Before scanning, based on a preset judgment rule, according to the average interval and the heart rate interval, judging whether there is misdetection or missing detection of Rtags in the target time zone, specifically: Before scanning, comparing the difference between the average interval information and the heart rate interval information with a preset judgment threshold, and judging whether there is misdetection or missing detection of Rtags in the target time zone according to the comparison result; the preset judgment threshold is determined by the average interval information; If the difference is greater than the first judgment threshold in the preset judgment threshold and the heart rate interval information is greater than the second judgment threshold, it is judged that there is a missing detection of Rtags in the target time zone; If the difference is greater than the first judgment threshold in the preset judgment threshold and the heart rate interval information is less than the third judgment threshold, it is judged that there is a misdetection of Rtags in the target time zone.

2. The control method for the radiation dose of cardiac scanning according to claim 1, wherein Before scanning, according to the average interval and the heart rate interval, avoiding misdetection or missing detection of Rtags in the target time zone further includes: When there is no misdetection or missing detection of Rtags in the target time zone, marking the heart rate interval in the target time zone with a trusted identifier; When there is misdetection or missing detection of Rtags in the target time zone, marking the heart rate interval in the target time zone with an untrusted identifier.

3. The control method for the radiation dose of cardiac scanning according to claim 2, wherein The method further includes: After marking the heart rate interval in the target time zone with an untrusted identifier, selecting a new target time zone to re-judge whether there is misdetection or missing detection of Rtags in the selected new target time zone.

4. The control method for the radiation dose of cardiac scanning according to claim 2, characterized in that, The method further includes: When starting to scan, judging whether the heart rate interval in the target time zone is trustworthy; If the heart rate interval in the target time zone has a trusted identifier, the heart rate interval in the target time zone is trustworthy, and continue scanning; If the heart rate interval in the target time zone has an untrusted identifier, the heart rate interval in the target time zone is untrustworthy, select a new target time zone, and continue to judge whether the heart rate interval in the new target time zone is trustworthy.

5. The control method for the radiation dose of cardiac scanning according to claim 1, wherein The method further includes: During the scanning process, controlling the poor Rtag during the scanning process based on the heart rate interval.

6. The control method for the radiation dose of cardiac scanning according to claim 5, wherein During the scanning process, controlling the poor Rtag during the scanning process based on the heart rate interval includes: Using a heart rate conversion formula to determine the heart rate value based on the heart rate interval information; When the heart rate value does not meet the preset heart rate threshold, then based on a preset scanning strategy, controlling the continuous scanning or rescan of the scanning process.

7. The control method for the radiation dose of cardiac scanning according to claim 6, characterized in that, The controlling the continuous scanning or stopping scanning of the scanning process based on a preset scanning strategy includes: In the intelligent planning mode; If the heart rate value is always lower than the preset heart rate threshold, uniformly determine the heart rate interval information with the preset heart rate threshold to complete the planned wire laying; Alternatively, if the heart rate value is lower than the preset heart rate threshold, rescan.

8. A control device for the radiation dose of a cardiac scan, characterized in that, Comprising: an acquisition module and an avoidance module; the acquisition module is configured to acquire the average interval of the electrocardiogram signal and the heart rate interval between two adjacent Rtags in the target time zone; the average interval is determined by the heart rate interval; the avoidance module is configured to avoid false detection or missed detection of Rtags in the target time zone according to the average interval and the heart rate interval before scanning, and it includes: before scanning, based on a preset judgment rule, judge whether there is false detection or missed detection of Rtags in the target time zone according to the average interval and the heart rate interval, specifically: before scanning, compare the difference between the average interval information and the heart rate interval information with a preset judgment threshold, and judge whether there is false detection or missed detection of Rtags in the target time zone according to the comparison result; the preset judgment threshold is determined by the average interval information; if the difference is greater than the first judgment threshold in the preset judgment threshold, and the heart rate interval information is greater than the second judgment threshold, it is judged that there is a missed detection of Rtags in the target time zone; if the difference is greater than the first judgment threshold in the preset judgment threshold, and the heart rate interval information is less than the third judgment threshold, it is judged that there is a false detection of Rtags in the target time zone.

9. A computer 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 steps of the control method for the cardiac scan radiation dose according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the control method for the cardiac scan radiation dose according to any one of claims 1 to 7 are implemented.

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