CN115951392A - Energy correction method, energy correction device, electronic apparatus, detection apparatus, and storage medium - Google Patents
Energy correction method, energy correction device, electronic apparatus, detection apparatus, and storage medium Download PDFInfo
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Abstract
The application relates to the technical field of ray detection, and particularly discloses an energy correction method, an energy correction device, electronic equipment, detection equipment and a storage medium. The energy correction method comprises the following steps: synchronously acquiring pulse signals and respectively acquiring energy values to be corrected and standard energy values of the pulse signals; acquiring an energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal; and correcting the energy value to be corrected of each pulse signal based on the energy correction function. Therefore, the energy value to be corrected and the standard energy value of each pulse signal can be corrected only by synchronously acquiring the energy value to be corrected and the standard energy value of each pulse signal and establishing an energy correction function according to the energy values, and compared with a neural network correction mode, the correction mode does not need complex calculation, occupies fewer resources, is simple in correction process, is suitable for the energy correction method even for a chip with few resources, and is strong in universality.
Description
Technical Field
The present application relates to the field of radiation detection technologies, and in particular, to an energy correction method and apparatus, an electronic device, a detection device, and a storage medium.
Background
The high-energy rays can be applied to various detection scenes such as security inspection, food safety, geological exploration, nuclear medicine and the like, and detection of the high-energy rays (such as X rays and gamma rays) generally needs a detection means such as a scintillation detector. The working principle of the scintillation detector is that a large number of visible photons which can be responded by a photoelectric conversion device are generated after high-energy rays are deposited through a scintillation crystal, then the photoelectric conversion device outputs an electric signal, and information such as energy, time and the like of the high-energy rays is obtained through acquisition and processing. Among them, the electronics of the acquisition process is a very important part, which affects the performance of the scintillation detector to some extent.
At present, in the electronic part of acquisition processing, the problem that an input energy spectrum and an output energy spectrum cannot be completely overlapped after linear transformation occurs. For example, MVT (Multi-Voltage Threshold sampling) digitization method, which is a scintillation detector electronics method commonly used in nuclear medicine, collects scintillation pulses generated by a scintillation detector by setting a plurality of Voltage thresholds, and then completes information acquisition of energy time by reconstructing the scintillation pulses.
In order to solve the problems, a method for correcting input pulse energy by using a neural network has been developed at present, but the method needs a large amount of data to participate in training, has a large calculation amount and a complicated calculation process, is not suitable for a chip with few resources, and has poor universality.
Disclosure of Invention
In view of the above, it is desirable to provide an energy correction method, an energy correction device, an electronic apparatus, a detection apparatus, and a computer-readable storage medium.
According to a first aspect of embodiments of the present application, there is provided an energy correction method, including: synchronously acquiring pulse signals and respectively acquiring energy values to be corrected and standard energy values of the pulse signals; acquiring an energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal; and correcting the energy value to be corrected of each pulse signal based on the energy correction function.
In one embodiment, the step of synchronously acquiring the pulse signals and respectively acquiring the energy value to be corrected and the standard energy value of each pulse signal includes: controlling a first acquisition device and a second acquisition device to synchronously acquire pulse signals; and acquiring the energy value of each pulse signal acquired by the first acquisition equipment to obtain an energy value to be corrected, and acquiring the energy value of each pulse signal acquired by the second acquisition equipment to obtain a standard energy value.
In one embodiment, the step of controlling the first acquisition device and the second acquisition device to synchronously acquire the pulse signals includes: when the first acquisition equipment finishes acquiring the current pulse signal, outputting a trigger signal to the second acquisition equipment so as to indicate the second acquisition equipment to reserve the currently acquired pulse signal.
In one embodiment, the step of controlling the first acquisition device and the second acquisition device to synchronously acquire the pulse signals includes: acquiring a sampling threshold corresponding to the first acquisition device; setting a comparison threshold according to the sampling threshold; when the target parameter value of the pulse signal is larger than the comparison threshold value, the pulse signal is output to the first acquisition equipment and the second acquisition equipment, and a trigger signal is output to the second acquisition equipment to indicate the second acquisition equipment to keep the currently acquired pulse signal.
In one embodiment, the comparison threshold is greater than the sampling threshold.
In one embodiment, the first acquisition device includes an MVT acquisition device, and the sampling threshold is a highest sampling threshold of the MVT acquisition device.
In one embodiment, the second acquisition device comprises an oscilloscope.
In one embodiment, the step of obtaining an energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal includes: acquiring a scatter diagram of the energy value to be corrected relative to the standard energy value according to the energy value to be corrected and the standard energy value of each pulse signal; and acquiring an energy correction function according to the distribution rule of each position point in the scatter diagram.
In one embodiment, the step of obtaining the energy correction function according to the distribution rule of each position point in the scatter diagram includes: extracting a plurality of target position points in the scatter diagram; solving a function of n times according to the coordinates of the target position points, wherein n is a natural number excluding 0, so as to obtain a fitting function; and verifying whether the fitting function meets the preset requirement, if not, adjusting the n-th function to be the n + 1-th function until the obtained fitting function meets the preset requirement, and taking the fitting function which finally meets the preset requirement as an energy correction function.
In one embodiment, the target position point includes a plurality of trend points in the scatter diagram, and the trend points include a plurality of gravity center points or center points corresponding to different positions in the abscissa of the scatter diagram.
In one embodiment, the target location points comprise all points in the scatter plot.
In one embodiment, the step of verifying whether the fitting function meets a preset requirement, and if not, adjusting the n-th-order function to be an n + 1-th-order function until the obtained fitting function meets the preset requirement, and taking the fitting function that finally meets the preset requirement as the energy correction function includes: determining error amount of the fitting function according to the energy value to be corrected and the standard energy value corresponding to each position point in the scatter diagram; and if the error amount exceeds the allowable range, continuously solving the function for n +1 times according to the coordinates of the target position point to obtain a new fitting function, and so on until the error amount of the fitting function is within the allowable range.
In one embodiment, the step of determining the error amount of the fitting function according to the energy value to be corrected corresponding to each position point in the scatter diagram and the standard energy value includes: correcting the energy value to be corrected of each position point in the scatter diagram through a fitting function to obtain a correction value; comparing the correction value corresponding to each position point with the standard energy value; and determining the error amount of the fitting function according to the comparison result.
According to a second aspect of embodiments of the present application, there is provided an energy correction device, comprising: the first acquisition module is configured to synchronously acquire pulse signals and respectively acquire energy values to be corrected and standard energy values of the pulse signals; the second acquisition module is used for acquiring an energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal; and the correction module is used for correcting the energy value to be corrected of each pulse signal based on the energy correction function.
In one embodiment, to synchronously acquire the pulse signals and respectively acquire the energy value to be corrected and the standard energy value of each pulse signal, the first acquiring module is further configured to: controlling a first acquisition device and a second acquisition device to synchronously acquire pulse signals; and acquiring the energy value of each pulse signal acquired by the first acquisition equipment to obtain an energy value to be corrected, and acquiring the energy value of each pulse signal acquired by the second acquisition equipment to obtain a standard energy value.
In one embodiment, the first acquisition device is configured to output a trigger signal to the second acquisition device when the current pulse signal is acquired, so as to instruct the second acquisition device to retain the currently acquired pulse signal.
In one embodiment, the energy correction apparatus further comprises a comparison unit configured to obtain a sampling threshold corresponding to the first acquisition device and set a comparison threshold according to the sampling threshold; when the target parameter value of the pulse signal is larger than the comparison threshold value, outputting the pulse signal to the first acquisition device and the second acquisition device, and outputting a trigger signal to the second acquisition device to indicate the second acquisition device to retain the currently acquired pulse signal.
In one embodiment, the comparison threshold is greater than the sampling threshold.
In one embodiment, the first acquisition device includes an MVT acquisition device, and the sampling threshold is a highest sampling threshold of the MVT acquisition device.
In one embodiment, the second acquisition device comprises an oscilloscope.
In one embodiment, to obtain the energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal, the second obtaining module is configured to: acquiring a scatter diagram of the energy value to be corrected relative to the standard energy value according to the energy value to be corrected and the standard energy value of each pulse signal; and acquiring an energy correction function according to the distribution rule of each position point in the scatter diagram.
In one embodiment, the second obtaining module further includes: an extraction unit configured to extract a plurality of target location points in the scatter diagram; the solving unit is configured to solve the n-order function according to the coordinates of the target position points, wherein n is a natural number not including 0, so as to obtain a fitting function; and the verification unit is configured for verifying whether the fitting function meets the preset requirement, if not, adjusting the n-th function to be an n + 1-th function until the obtained fitting function meets the preset requirement, and taking the fitting function which finally meets the preset requirement as an energy correction function.
In one embodiment, the verification unit is further configured to: determining error amount of the fitting function according to the energy value to be corrected and the standard energy value corresponding to each position point in the scatter diagram; and if the error amount exceeds the allowable range, continuously solving the function for n +1 times according to the coordinates of the target position point to obtain a new fitting function, and so on until the error amount of the fitting function is within the allowable range.
In one embodiment, to determine the error amount of the fitting function according to the to-be-corrected energy value and the standard energy value corresponding to each position point in the scatter diagram, the verification unit is further configured to: correcting the energy value to be corrected of each position point in the scatter diagram through a fitting function to obtain a corrected value; comparing the correction value corresponding to each position point with the standard energy value; and determining the error amount of the fitting function according to the comparison result.
According to a third aspect of embodiments of the present application, there is provided an electronic apparatus, including: a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the energy correction method as described above.
According to a fourth aspect of embodiments of the present application, there is provided a detection apparatus comprising an energy correction device as described above.
According to a fifth aspect of embodiments herein, there is provided a computer readable storage medium, having stored thereon a computer program which, when executed by a processor, carries out the steps of the energy correction method as described above.
According to the energy correction method, the standard energy value of each pulse signal is acquired while the energy value to be corrected of each pulse signal is acquired, the energy correction function can be acquired based on the energy value to be corrected and the standard energy value, the energy value to be corrected of each pulse signal can be corrected based on the energy correction function, therefore, the energy value of each pulse signal can be corrected only by establishing the energy correction function, the correction mode is compared with a neural network correction mode, complex calculation is not needed, the occupied resources are few, the correction process is simple, even a chip with few resources is suitable for the energy correction method, and the universality is high.
Drawings
Fig. 1 is a block flow diagram of an energy correction method according to an embodiment of the present application;
fig. 2 is a block diagram of a flow of step S200 in an energy correction method according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a synchronous acquisition pulse signal in an energy correction method according to an embodiment of the present application;
fig. 4 is a block diagram of a flow of step S210 in an energy correction method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a synchronous acquisition pulse signal in an energy correction method according to another embodiment of the present application;
fig. 6 is a block flow diagram of step S400 in the energy correction method according to an embodiment of the present application;
FIG. 7 is a scatter diagram of the energy value to be corrected with respect to the standard energy value for each pulse signal;
fig. 8 is a block diagram of a flow of step S420 in the energy correction method according to an embodiment of the present application;
fig. 9 is a flowchart of step S423 in the energy correction method according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of an energy correction device according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Some preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that the following description is for illustrative purposes and is not intended to limit the scope of the present application.
In one embodiment, referring to fig. 1, an energy correction method is provided. The energy correction method provided by the embodiment comprises the following steps:
step S200, synchronously acquiring pulse signals and respectively acquiring the energy value to be corrected and the standard energy value of each pulse signal.
The energy value to be corrected refers to an energy value obtained by acquiring a pulse signal through acquisition equipment and further processing, and due to the limitation of the acquisition equipment, the energy value and a real energy value are prone to have deviation, so that the energy value needs to be corrected. In this embodiment, the standard energy value corresponding to each pulse signal is also obtained while the energy value to be corrected of each pulse signal is obtained, where the standard energy value refers to a true energy value corresponding to the pulse signal and may be obtained by measurement performed by an electronic measurement instrument (e.g., an oscilloscope), so as to ensure that the true energy value of each pulse signal can be obtained.
Step S400, acquiring an energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal.
After the energy value to be corrected and the standard energy value of each pulse signal are obtained, the difference rule between the energy value to be corrected and the standard energy value of each pulse signal can be analyzed, and then an energy correction function is obtained, wherein the energy correction function can reflect the mathematical relationship between the energy value to be corrected and the standard energy value.
And S600, correcting the energy value to be corrected of each pulse signal based on the energy correction function.
After the energy correction function is obtained, the energy value to be corrected of each pulse signal can be substituted into the energy correction function to correct the energy value to be corrected, that is, the energy value to be corrected of the pulse signal acquired by the acquisition equipment is substituted into the energy correction function to obtain the real energy value of the pulse signal, so as to finish the correction of the energy value to be corrected.
In this embodiment, the pulse signal in a certain time period may be acquired to obtain the energy value to be corrected and the standard energy value of the pulse signal in the time period, so as to obtain an energy correction function, and the energy correction function may be used to correct the energy value to be corrected of the pulse signal acquired in other time periods.
The energy correction method provided by this embodiment collects the energy value to be corrected of each pulse signal and simultaneously collects the standard energy value of each pulse signal, based on the energy value to be corrected and the standard energy value, the energy correction function can be obtained, and based on the energy correction function, the energy value to be corrected of each pulse signal can be corrected.
In one embodiment, referring to fig. 2, step S200, namely, the step of synchronously acquiring the pulse signals and respectively acquiring the energy value to be corrected and the standard energy value of each pulse signal, includes:
and step S210, controlling the first acquisition equipment 10 and the second acquisition equipment 20 to synchronously acquire the pulse signals.
In this embodiment, the first collecting device 10 may be a collecting device for collecting a pulse signal in an actual application scenario, for example, an MVT collecting device. The second acquisition device 20 may be an electronic measuring device, such as an oscilloscope or the like, by which the true electrical parameters of the pulse signal may be obtained. The pulse signals are synchronously acquired by the first acquisition device 10 and the second acquisition device 20 to ensure that the energy value to be corrected corresponding to the first acquisition device 10 corresponds to the standard energy value corresponding to the second acquisition device 20 at the same time.
Step S220, obtaining the energy value of each pulse signal collected by the first collecting device 10 to obtain an energy value to be corrected, and obtaining the energy value of each pulse signal collected by the second collecting device 20 to obtain a standard energy value.
After the first collection device 10 and the second collection device 20 synchronously collect a certain number of pulse signals, the energy value of each pulse signal collected by the first collection device 10 may be obtained through an integral operation, and is used as the energy value to be corrected, and the energy value of each pulse signal collected by the second collection device 20 may also be obtained through an integral operation, and is used as the standard energy value. Thereby, the energy value to be corrected and the standard energy value of each pulse signal can be obtained. The integration operation method may include a newton integration method, a riemann integration method, a numerical integration method, and the like, which is not limited in particular.
In one embodiment, the step S210 of controlling the first acquisition device and the second acquisition device to synchronously acquire the pulse signals includes: when the first acquiring device 10 finishes acquiring the current pulse signal, it outputs a trigger signal to the second acquiring device 20 to instruct the second acquiring device 20 to retain the currently acquired pulse signal.
Referring to fig. 3, in practical application, a pulse signal output by the photoelectric conversion device may be synchronously input to the first collection device 10 and the second collection device 20, as an electronic measurement device such as an oscilloscope, may collect all input signals, but under the condition of no external trigger, it usually does not actively retain the collected data, that is, the data that cannot be collected with the first collection device 10 enters a subsequent processing and analysis link. Therefore, in order to reserve the data acquired by the second acquisition device 20 for subsequent processing and analysis, in an embodiment, when the first acquisition device 10 finishes acquiring the currently input pulse signal, an acquired flag signal is generated, and the flag signal is used as a trigger signal of the second acquisition device 20 and is sent to the second acquisition device 20, and when the second acquisition device 20 receives the trigger signal, the currently acquired pulse signal is reserved, so that the pulse signals currently input to the first acquisition device 10 and the second acquisition device 20 can also be synchronously acquired and reserved by the second acquisition device 20 when being acquired by the first acquisition device 10.
Taking the first acquisition device 10 as an MVT acquisition device and the second acquisition device 20 as an oscilloscope as an example, when the MVT acquisition device acquires a pulse signal (that is, the amplitude of the pulse signal exceeds the preset threshold of the MVT acquisition device), it outputs an acquired flag signal, outputs the flag signal to the oscilloscope, and the oscilloscope uses the flag signal as a trigger signal to trigger and retain the pulse signal, and when a non-acquisition channel of the oscilloscope receives the trigger signal, the acquisition channel is triggered to retain the currently acquired pulse signal. Generally, the voltage value of the trigger signal is greater than the trigger voltage of the oscilloscope, and assuming that the trigger voltage of the oscilloscope is 1V, the voltage value of the trigger signal may be greater than 1V, such as 3V, thereby ensuring that the trigger signal can be collected by the oscilloscope. By the mode, the MVT acquisition equipment and the oscilloscope can acquire the pulse waveforms in the same time period at the same time.
Besides the above, the second acquisition device is triggered to retain the acquired data when the acquisition of the first acquisition device is finished, and the first acquisition device and the second acquisition device can be ensured to synchronously acquire the pulses in the same time period in other manners. For example, each acquisition device often has a certain acquisition condition, and can be acquired when data meets the condition, so that before the pulse signal is input to each acquisition device, it can be judged in advance whether the pulse signal can be acquired by each acquisition device, and if so, the pulse signal is input to each acquisition device, and meanwhile, the second acquisition device is instructed to retain the input pulse signal.
Specifically, in another embodiment, referring to fig. 4, step S210, that is, the step of controlling the first acquisition device and the second acquisition device to synchronously acquire the pulse signals includes:
step S211, a sampling threshold corresponding to the first capturing device 10 is acquired.
The sampling threshold of the first acquisition device 10 may be used for comparison with the amplitude of the pulse signal to be input, and when the amplitude of the pulse signal to be input can cross the sampling threshold, the pulse signal may be acquired by the first acquisition device 10.
In one embodiment, the first acquisition device 10 includes an MVT acquisition device, the sampling threshold is the highest sampling threshold of the MVT acquisition device, and when the amplitude of the pulse signal can cross the highest sampling threshold of the MVT acquisition device, the MVT acquisition device can acquire the complete waveform of the pulse signal.
Step S212, a comparison threshold is set according to the sampling threshold.
After the sampling threshold of the first acquisition device 10 is obtained, a comparison threshold may be set according to the sampling threshold, where the comparison threshold may be used to compare with the amplitude of the pulse signal before the pulse signal is input to each acquisition device, so as to determine in advance whether the pulse signal can be acquired by the first acquisition device 10.
In one embodiment, the comparison threshold may be a numerical value greater than the sampling threshold. Since the comparison threshold is greater than the sampling threshold, when the amplitude of the pulse signal is greater than the comparison threshold, the amplitude of the pulse signal may certainly exceed the sampling threshold, that is, it may be determined that the pulse signal may be collected by the first collecting apparatus 10. For example, the maximum sampling threshold of the MVT acquisition device is 80V, the comparison threshold may be set to be 81V, 85V, 90V, 100V, or the like, and when the amplitude of the pulse signal to be input is greater than the comparison threshold, the maximum sampling threshold of the MVT acquisition device can be necessarily crossed, that is, it may be determined that the MVT acquisition device can completely acquire the complete waveform of the pulse signal to be input.
It should be understood by those skilled in the art that the pulse signal that can be successfully acquired by the MVT acquisition device can be acquired by the oscilloscope, and therefore, in this embodiment, the comparison threshold value may be determined only according to the sampling threshold value of the first acquisition device, that is, only whether the pulse signal can be acquired by the first acquisition device needs to be confirmed.
Step S213, when the target parameter value of the pulse signal is greater than the comparison threshold, outputting the pulse signal to the first collection device 10 and the second collection device 20, and outputting a trigger signal to the second collection device 20 to instruct the second collection device 20 to retain the currently collected pulse signal.
The target parameter value of the pulse signal may include an amplitude of the pulse signal, and when the amplitude is greater than the comparison threshold, it may be determined that the pulse signal may be acquired by the first acquisition device 10, and therefore, the pulse signal is output to the first acquisition device 10 and the second acquisition device 20, so that the first acquisition device 10 and the second acquisition device 20 acquire the pulse signal, and simultaneously output the trigger signal to the second acquisition device 20, and when the second acquisition device 20 receives the trigger signal, the currently acquired pulse signal is retained, and thus, the first acquisition device 10 and the second acquisition device 20 may acquire the pulse signal at the same time in synchronization.
In this embodiment, referring to fig. 5, a comparator 30 may be arranged to implement the comparison between the comparison threshold and the target parameter value of the pulse signal, when the target parameter value of the pulse signal is greater than the comparison threshold, the pulse signal is synchronously output to the first collecting device 10 and the second collecting device 20, and a high-level square wave signal is output to the second collecting device 20 at the same time to serve as a trigger signal, and then the first collecting device 10 and the second collecting device 20 may synchronously collect the pulse signal, and meanwhile, the second collecting device 20 may also retain the collected pulse signal, so as to facilitate subsequent processing.
In one embodiment, referring to fig. 6, in step S400, the step of obtaining the energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal includes:
step S410, obtaining a scatter diagram of the energy value to be corrected with respect to the standard energy value according to the energy value to be corrected and the standard energy value of each pulse signal.
When the energy value to be corrected and the standard energy value of each pulse signal are obtained, a scatter diagram of the energy value to be corrected relative to the standard energy value can be established. Specifically, referring to 7,X, the axis may represent an energy value to be corrected of each pulse signal, the axis Y may represent a standard energy value of each pulse signal, one pulse signal corresponds to one X value and one Y value, and is recorded as coordinates (X, Y), and the collected pulse signals may form a set (X, Y) i ，Y i ),(X i ，Y i ) Is the combination of the energy value to be corrected and the standard energy value of the ith sampled pulse signal, wherein i is a positive integer less than or equal to the total number of the collected pulse signals. Will (X) i ，Y i ) And drawing each point in a two-dimensional coordinate system to obtain a scatter diagram of the energy value to be corrected of each pulse signal relative to the standard energy value.
And step S420, acquiring an energy correction function according to the distribution rule of each position point in the scatter diagram.
The method comprises the steps of analyzing each position point in a scatter diagram, determining the distribution rule of each position point, further determining the mathematical relationship between the energy value to be corrected corresponding to each position point and the standard energy value, and accordingly constructing an energy correction function.
In one embodiment, referring to fig. 8, in step S420, that is, the step of obtaining the energy correction function according to the distribution rule of each position point in the scatter diagram includes:
and step S421, extracting a plurality of target position points in the scatter diagram.
The target position point may include a number of trend points in the scatter diagram. The trend of each position point can be clearly seen through the scatter diagram, and in order to simplify the correction process, main trend points in the scatter diagram can be extracted according to the trend of each position point.
The tendency point extraction mode can adopt a gravity center extraction method, namely, the coordinates of a plurality of gravity center points corresponding to different positions of the abscissa in the scatter diagram are obtained through calculation. Specifically, the abscissa may be divided into a plurality of parts, an average of the abscissas of all the points in each part may be calculated, that is, the abscissa of the center of gravity point in each part, and an average of the ordinates of all the points in each part may be calculated, that is, the ordinate of the center of gravity point in each part, so that the abscissa of the center of gravity point in each part may be obtained, that is, a plurality of center of gravity points in the scatter diagram may be extracted, and the extracted abscissa is used as the tendency point. For example, the total length of the abscissa is X, the total length is divided into N parts, X =1000, N =500, the length of each part is 2, the first part is 0 to 2, the second part is 2 to 4, the third part is 4 to 6, and so on, and if 100 points exist in the range of 0 to 2, the average value of the abscissa and the average value of the ordinate of the 100 points are calculated to obtain the coordinates of the gravity point in the range of 0 to 2, and so on, the coordinates of 500 gravity points can be obtained, that is, 500 gravity points can be obtained, and the coordinates are used as the trend points of the scatter diagram.
The trend point extraction method may also be a center extraction method, and since the center of the scatter diagram is the same as the center of gravity in this embodiment, the center extraction method is the same as the center of gravity extraction method, which is not described herein again.
In another embodiment, the target location points may include all points in the scatter diagram, i.e. all points in the scatter diagram are directly extracted for determination of the subsequent function.
And S422, solving a function of n times according to the coordinates of the target position points, wherein n is a natural number excluding 0, so as to obtain a fitting function.
For example, when several target location points are extracted, an attempt may be made to solve from a first order function to obtain a first order fit function.
Specifically, a linear equation may be fitted first: y = kx + b, where x is the energy value to be corrected corresponding to the first acquisition device, and y is the corrected value after correction.
And substituting the obtained coordinates of the target position point into the linear equation, and further solving the values of k and b to further solve a linear function as a fitting function.
Step S423, verifying whether the fitting function meets the preset requirement, if not, adjusting the n-th function to be the n + 1-th function until the obtained fitting parameter meets the preset requirement, and taking the fitting function which finally meets the preset requirement as the energy correction function.
After the fitting function is preliminarily determined, the fitting function can be verified, namely, the correction precision of the fitting function is judged, if the precision meets the preset requirement, adjustment is not needed, the fitting function is directly used as an energy correction function, if the precision does not meet the preset condition, the fitting function needs to be further adjusted, namely, the n-th function is adjusted to be the n + 1-th function, the n + 1-th function is solved, and then the n + 1-th function is verified until the fitting function meeting the requirement is obtained and is used as the energy correction function.
In one embodiment, referring to fig. 9, in step S423, it is verified whether the fitting function meets the preset requirement, if not, the n-th function is adjusted to be the n + 1-th function until the obtained fitting function meets the preset requirement, and the step of taking the fitting function that finally meets the preset requirement as the energy correction function includes:
step S423a, determining an error amount of the fitting function according to the to-be-corrected energy value and the standard energy value corresponding to each position point in the scatter diagram.
The error amount of the fitting function may be an error amount between the correction value corrected by the fitting function and the standard energy value. Specifically, a plurality of position points in the scatter diagram may be randomly selected, the energy value to be corrected of each position point in the scatter diagram is corrected through the fitting function, so as to obtain a correction value, that is, each position point, that is, the energy value to be corrected corresponding to each pulse signal is respectively substituted into the fitting function, so as to obtain the correction value, the correction value corresponding to each position point is compared with the standard energy value, and the error amount of the fitting function is determined according to the comparison result. Specifically, correction error values (i.e., differences between the correction values and the standard energy values) corresponding to the respective position points may be obtained, and the error amount of the fitting function may be determined based on the correction error values of the respective position points.
In one embodiment, the maximum of the corrected error values for each location point may be selected as the error amount for the fitting function.
For example, solving a linear function as: y =0.8x +0.3, x is an energy value to be corrected, y is a corrected value obtained after correction, assuming that four points existing in the scatter diagram are extracted, coordinates are (1,1.5), (3,3.5), (6,5.5) and (10,9.5), respectively, abscissa of the four points is substituted into x in the linear function, and the obtained y values are 1.1, 2.7, 5.1 and 8.3, respectively, so that it can be seen that each y value (i.e., corrected value) and ordinate (i.e., standard energy value) of each point in the scatter diagram are different, error values are 0.4, 0.8, 0.4 and 1.7, respectively, wherein the maximum error value is 1.7, namely, the error of the fitting function is 1.7.
And step S423b, if the error amount exceeds the allowable range, continuously solving the function for n +1 times according to the coordinates of the target position point to obtain a new fitting function, and so on until the error amount of the fitting function is within the allowable range.
And after the error amount of the fitting function is obtained, judging whether the error amount exceeds the allowable range, returning to the example, if the allowable range of the error is 0-1.5, and the error amount of the fitting function is 1.7 which exceeds the allowable range of 0-1.5, the accuracy of the fitting function is considered to be not in accordance with the requirement, the primary function cannot be used as the energy correction function, and the quadratic function needs to be continuously solved.
The equation of the quadratic function is y = ax 2 + cx + d, similar to the method of solving the linear function, that is, substituting the coordinates of the target position point in the acquired scatter diagram into the quadratic functionIn the equation of the number, the values of a, b and c are obtained by solving, and then a quadratic function is solved to be used as a fitting function. And verifying the precision of the fitting function in the verification mode, which is not repeated herein, if the fitting function meets the requirement, taking the fitting function as an energy correction function, if the fitting function does not meet the requirement, further solving a cubic function, and so on until the fitting function meets the requirement, and finally taking the fitting function meeting the preset requirement as the energy correction function.
In this embodiment, the allowable range of the error may be set according to actual requirements, for example, in a logging scenario, in the case that the total energy track address is 256 tracks, the allowable range of the error may be within one energy track address, and if the error amount exceeds one energy track address, the fitting function needs to be continuously adjusted.
It should be understood that, although the steps in the flowcharts related to the embodiments are shown in sequence as indicated by the arrows, the steps are not necessarily executed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the above embodiments may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, another embodiment of the present application further provides an energy correction device for implementing the energy correction method. The implementation scheme for solving the problem provided by the energy correction device is similar to the implementation scheme described in the above method, so specific limitations in one or more embodiments of the energy correction device provided below can be referred to the limitations of the energy correction method in the above, and are not described herein again.
Referring to fig. 10, the energy correction apparatus provided in this embodiment includes a first obtaining module 200, a second obtaining module 400, and a correction module 600. Wherein:
a first obtaining module 200 configured to synchronously acquire pulse signals and respectively obtain an energy value to be corrected and a standard energy value of each pulse signal;
a second obtaining module 400, configured to obtain an energy correction function according to the energy value to be corrected of each pulse signal and the standard energy value;
and the correcting module 600 is configured to correct the energy value to be corrected of each pulse signal based on the energy correction function.
In one embodiment, to synchronously acquire the pulse signals and respectively acquire the energy value to be corrected and the standard energy value of each pulse signal, the first acquiring module 200 is further configured to: controlling a first acquisition device and a second acquisition device to synchronously acquire pulse signals; and acquiring the energy value of each pulse signal acquired by the first acquisition equipment to obtain an energy value to be corrected, and acquiring the energy value of each pulse signal acquired by the second acquisition equipment to obtain a standard energy value.
In one embodiment, the first acquisition device is configured to output a trigger signal to the second acquisition device when the current pulse signal is acquired, so as to instruct the second acquisition device to retain the currently acquired pulse signal.
In one embodiment, the energy correction apparatus provided in this embodiment further includes a comparison unit, where the comparison unit is configured to obtain a sampling threshold corresponding to the first acquisition device and set a comparison threshold according to the sampling threshold; when the target parameter value of the pulse signal is larger than the comparison threshold value, the pulse signal is output to the first acquisition equipment and the second acquisition equipment, and a trigger signal is output to the second acquisition equipment to indicate the second acquisition equipment to keep the currently acquired pulse signal.
In one embodiment, the comparison threshold is greater than the sampling threshold.
In one embodiment, the first acquisition device includes an MVT acquisition device, and the sampling threshold is a highest sampling threshold of the MVT acquisition device.
In one embodiment, the second acquisition device comprises an oscilloscope.
In one embodiment, to obtain the energy correction function according to the to-be-corrected energy value and the standard energy value of each pulse signal, the second obtaining module 400 is configured to obtain a scatter diagram of the to-be-corrected energy value with respect to the standard energy value according to the to-be-corrected energy value and the standard energy value of each pulse signal; and acquiring an energy correction function according to the distribution rule of each position point in the scatter diagram.
In one embodiment, the second obtaining module 400 further includes an extracting unit, a solving unit, and a verifying unit, wherein the extracting unit is configured to extract a number of target location points in the scatter diagram; the solving unit is configured to solve the n-time function according to the coordinates of the target position points, wherein n is a natural number excluding 0, so as to obtain a fitting function; the verification unit is configured to verify whether the fitting function meets a preset requirement, and if not, adjust the fitting function until the fitting function meets the preset requirement, so that the fitting function which finally meets the preset requirement is used as an energy correction function.
In one embodiment, the target position point includes a plurality of tendency points in the scatter diagram, and the plurality of tendency points include a plurality of gravity center points or center points corresponding to different positions in the abscissa in the scatter diagram.
In one embodiment, the target location points comprise all points in the scatter plot.
In one embodiment, the verification unit is further configured to: determining error amount of the fitting function according to the energy value to be corrected and the standard energy value corresponding to each position point in the scatter diagram; and if the error amount exceeds the allowable range, continuously solving the function for n +1 times according to the coordinates of the target position point to obtain a new fitting function, and so on until the error amount of the fitting function is within the allowable range.
In one embodiment, to determine the error amount of the fitting function according to the to-be-corrected energy value and the standard energy value corresponding to each position point in the scatter diagram, the verification unit is further configured to: correcting the energy value to be corrected of each position point in the scatter diagram through a fitting function to obtain a corrected value; comparing the correction value corresponding to each position point with the standard energy value; and determining the error amount of the fitting function according to the comparison result.
The modules in the energy correction device can be wholly or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a detection device is provided that may comprise any of the components used to implement the energy correction apparatus described in the previous embodiments of the present application. For example, the detection device may be implemented in hardware, software programs, firmware, or a combination thereof.
In one embodiment, an electronic device is provided, comprising a memory and a processor, the memory storing a computer program, the processor implementing the steps of the above method embodiments when executing the computer program.
Fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device may be a server, and an internal structural diagram of the electronic device may be as shown in fig. 11. The electronic device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic equipment comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the electronic device is used for storing various data related to the energy correction method. The network interface of the electronic device is used for connecting and communicating with an external terminal through a network. The computer program is executed by a processor to implement an energy correction method.
Those skilled in the art will appreciate that the architecture shown in fig. 11 is a block diagram of only a portion of the architecture associated with the subject application, and does not constitute a limitation on the electronic devices to which the subject application may be applied, and that a particular electronic device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (27)
1. An energy correction method, characterized in that the energy correction method comprises:
synchronously acquiring pulse signals and respectively acquiring energy values to be corrected and standard energy values of the pulse signals;
acquiring an energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal;
and correcting the energy value to be corrected of each pulse signal based on the energy correction function.
2. The energy correction method according to claim 1, wherein the step of synchronously acquiring the pulse signals and respectively acquiring the energy value to be corrected and the standard energy value of each pulse signal comprises:
controlling a first acquisition device and a second acquisition device to synchronously acquire pulse signals;
and acquiring the energy value of each pulse signal acquired by the first acquisition equipment to obtain an energy value to be corrected, and acquiring the energy value of each pulse signal acquired by the second acquisition equipment to obtain a standard energy value.
3. The energy correction method of claim 2, wherein the step of controlling the first and second acquisition devices to acquire pulse signals synchronously comprises:
when the first acquisition equipment finishes acquiring the current pulse signal, outputting a trigger signal to the second acquisition equipment to indicate the second acquisition equipment to reserve the currently acquired pulse signal.
4. The energy correction method of claim 2, wherein the step of controlling the first and second acquisition devices to acquire pulse signals synchronously comprises:
acquiring a sampling threshold corresponding to the first acquisition device;
setting a comparison threshold according to the sampling threshold;
when the target parameter value of the pulse signal is larger than the comparison threshold value, outputting the pulse signal to the first acquisition device and the second acquisition device, and outputting a trigger signal to the second acquisition device to indicate the second acquisition device to retain the currently acquired pulse signal.
5. The energy correction method of claim 4, wherein the comparison threshold is greater than the sampling threshold.
6. The energy correction method of claim 4, wherein the first acquisition device comprises an MVT acquisition device, and the sampling threshold is a highest sampling threshold of the MVT acquisition device.
7. The energy correction method of any of claims 2-6, wherein the second acquisition device comprises an oscilloscope.
8. The energy correction method according to claim 1, wherein the step of obtaining an energy correction function based on the energy value to be corrected and the standard energy value of each pulse signal comprises:
acquiring a scatter diagram of the energy value to be corrected relative to the standard energy value according to the energy value to be corrected and the standard energy value of each pulse signal;
and acquiring an energy correction function according to the distribution rule of each position point in the scatter diagram.
9. The energy correction method according to claim 8, wherein the step of obtaining the energy correction function according to the distribution rule of each position point in the scatter diagram includes:
extracting a plurality of target position points in the scatter diagram;
solving a function of n times according to the coordinates of the target position points, wherein n is a natural number excluding 0, so as to obtain a fitting function;
and verifying whether the fitting function meets the preset requirement, if not, adjusting the n-th-order function to be the n + 1-th-order function until the obtained fitting function meets the preset requirement, and taking the fitting function which finally meets the preset requirement as an energy correction function.
10. The energy correction method according to claim 9, wherein the target position point includes a plurality of tendency points in the scattergram, and the plurality of tendency points include a plurality of gravity center points or center points corresponding to different positions in an abscissa in the scattergram.
11. The energy correction method of claim 9, wherein the target location points comprise all points in the scatter plot.
12. The energy correction method according to claim 9, wherein the step of verifying whether the fitting function meets a preset requirement, and if not, adjusting the n-th function to be an n + 1-th function until the obtained fitting function meets the preset requirement, and taking the fitting function finally meeting the preset requirement as the energy correction function comprises:
determining error amount of the fitting function according to the energy value to be corrected and the standard energy value corresponding to each position point in the scatter diagram;
and if the error amount exceeds the allowable range, continuously solving the function for n +1 times according to the coordinates of the target position point to obtain a new fitting function, and so on until the error amount of the fitting function is within the allowable range.
13. The energy correction method according to claim 12, wherein the step of determining an error amount of the fitting function based on the energy value to be corrected and the standard energy value corresponding to each position point in the scatter diagram comprises:
correcting the energy value to be corrected of each position point in the scatter diagram through a fitting function to obtain a corrected value;
comparing the correction value corresponding to each position point with the standard energy value;
and determining the error amount of the fitting function according to the comparison result.
14. An energy correction device, characterized in that the energy correction device comprises:
the first acquisition module is configured to synchronously acquire pulse signals and respectively acquire energy values to be corrected and standard energy values of the pulse signals;
the second acquisition module is used for acquiring an energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal;
and the correction module is used for correcting the energy value to be corrected of each pulse signal based on the energy correction function.
15. The energy correction device of claim 14, wherein to synchronously acquire the pulse signals and respectively acquire the energy value to be corrected and the standard energy value of each pulse signal, the first acquiring module is further configured to:
controlling a first acquisition device and a second acquisition device to synchronously acquire pulse signals;
and acquiring the energy value of each pulse signal acquired by the first acquisition equipment to obtain an energy value to be corrected, and acquiring the energy value of each pulse signal acquired by the second acquisition equipment to obtain a standard energy value.
16. The energy correction device of claim 15, wherein the first collection device is configured to output a trigger signal to the second collection device when the collection of the current pulse signal is completed, so as to instruct the second collection device to retain the currently collected pulse signal.
17. The energy correction apparatus according to claim 15, further comprising a comparison unit configured to obtain a sampling threshold corresponding to the first acquisition device and set a comparison threshold according to the sampling threshold; when the target parameter value of the pulse signal is larger than the comparison threshold value, outputting the pulse signal to the first acquisition device and the second acquisition device, and outputting a trigger signal to the second acquisition device to indicate the second acquisition device to retain the currently acquired pulse signal.
18. The energy correction device of claim 17, wherein the comparison threshold is greater than the sampling threshold.
19. The energy correction apparatus of claim 17, wherein the first acquisition device comprises an MVT acquisition device, and the sampling threshold is a highest sampling threshold of the MVT acquisition device.
20. The energy correction device of any one of claims 15-19, wherein the second collection apparatus comprises an oscilloscope.
21. The energy correction device of claim 14, wherein to obtain the energy correction function according to the energy value to be corrected and the standard energy value of each pulse signal, the second obtaining module is configured to:
acquiring a scatter diagram of the energy value to be corrected relative to the standard energy value according to the energy value to be corrected and the standard energy value of each pulse signal;
and acquiring an energy correction function according to the distribution rule of each position point in the scatter diagram.
22. The energy correction device of claim 21, wherein the second acquisition module further comprises:
an extracting unit configured to extract a number of target position points in the scatter diagram;
the solving unit is configured to solve the n-time function according to the coordinates of the target position points, wherein n is a natural number excluding 0, so as to obtain a fitting function;
and the verification unit is configured to verify whether the fitting function meets the preset requirement, if not, the n-th-order function is adjusted to be the n + 1-th-order function until the obtained fitting function meets the preset requirement, and the fitting function which finally meets the preset requirement is used as the energy correction function.
23. The energy correction device of claim 22, wherein the verification unit is further configured to:
determining error amount of the fitting function according to the energy value to be corrected and the standard energy value corresponding to each position point in the scatter diagram;
and if the error amount exceeds the allowable range, continuously solving the function for n +1 times according to the coordinates of the target position point to obtain a new fitting function, and so on until the error amount of the fitting function is within the allowable range.
24. The energy correction device according to claim 23, wherein to determine the error amount of the fitting function based on the energy value to be corrected and the standard energy value corresponding to each position point in the scatter diagram, the verification unit is further configured to:
correcting the energy value to be corrected of each position point in the scatter diagram through a fitting function to obtain a correction value;
comparing the correction value corresponding to each position point with the standard energy value;
and determining the error amount of the fitting function according to the comparison result.
25. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the energy correction method according to any one of claims 1 to 13.
26. A detection apparatus, comprising: the energy correction device of any one of claims 14-24.
27. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the energy correction method according to any one of claims 1 to 13.
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| PCT/CN2023/135149 WO2024125305A1 (en) | 2022-12-17 | 2023-11-29 | Energy correction method and apparatus, electronic device, detection device and storage medium |
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| WO2024125305A1 (en) * | 2022-12-17 | 2024-06-20 | 苏州瑞派宁科技有限公司 | Energy correction method and apparatus, electronic device, detection device and storage medium |
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| CN104337531B (en) * | 2013-07-25 | 2016-12-28 | 苏州瑞派宁科技有限公司 | Method and system are met at heat input for digital PET system |
| CN104035122A (en) * | 2014-05-22 | 2014-09-10 | 沈阳东软医疗系统有限公司 | Method and device for correcting energy value |
| CN104382611B (en) * | 2014-11-13 | 2017-01-11 | 沈阳东软医疗系统有限公司 | Correction method and device of output energy of photomultiplier |
| CN105824817B (en) * | 2015-01-05 | 2019-05-21 | 苏州瑞派宁科技有限公司 | A kind of digitizing solution of scintillation pulse |
| CN105030263B (en) * | 2015-07-22 | 2018-06-12 | 湖北锐世数字医学影像科技有限公司 | The energy back bearing calibration of number PET a kind of and system |
| CN105115994A (en) * | 2015-07-22 | 2015-12-02 | 武汉数字派特科技有限公司 | Digital PET energy parameterization calibration method and system |
| CN105212954B (en) * | 2015-11-05 | 2018-03-16 | 苏州瑞派宁科技有限公司 | A kind of pulse pile-up event real-time processing method and system |
| CN108288371A (en) * | 2017-12-15 | 2018-07-17 | 广州智光自动化有限公司 | Based on the time-multiplexed electric flux synchronous sampling system of bus |
| CN110811659B (en) * | 2019-10-17 | 2022-11-18 | 湖北锐世数字医学影像科技有限公司 | Time data processing method, device and system |
| CN115951392A (en) * | 2022-12-17 | 2023-04-11 | 苏州瑞派宁科技有限公司 | Energy correction method, energy correction device, electronic apparatus, detection apparatus, and storage medium |
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