KR20160076872A - Method and apparatus for real-time photo-peak searching - Google Patents

Abstract

According to the present invention, a method to explore for a photo-peak in real time includes: a step of receiving a radiation energy value outputted from a radiation counter; a step of updating a through point parameter value on a radiation energy spectrum based on the size of the received radiation energy value; a step of setting an initial value of a photo-peak parameter value based on the through point parameter value; a step of updating the photo-peak parameter value on the radiation energy spectrum based on the size of the received radiation energy value; and a step of outputting the photo-peak parameter value, determined at the updating step, as a photo-peak value. The through point parameter value updating step updates the through point parameter value depending on the received radiation energy value if the received radiation energy value is included in a range of a value greater or smaller than the through point parameter value as much as a first exploration range. The photo-peak parameter value updating step updates the photo-peak parameter value depending on the received radiation energy value if the received radiation energy value is included in a range of a value greater or smaller than the photo-peak parameter value as much as a second exploration range.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method and apparatus for real-

FIELD OF THE INVENTION The present invention relates to a method and system for real-time searching for photo-peaks of radiation detected in a radiation counter such as a semiconductor sensor counter or an ionization sensor counter.

Recently, as the use of radiation and the importance of radiation have been increasingly recognized, the need for radiation measurement technology is increasing. In order to exclude natural radiation and scattered radiation and to detect the desired radiation, radiation counters generally use a Lower Level Discriminator (LLD) and an Upper Level Discriminator (ULD). The conventional wave detector is difficult to detect in real time because it finds the photoelectric peak after fully acquiring the energy spectrum.

In addition, the radiation counter may have a gain change depending on the applied voltage and temperature. The gain change causes band shift of the energy, which causes the detection of noise such as natural radiation and scattering radiation. It is impossible to correct the gain variation caused by environmental changes such as the detector temperature and the applied voltage. In order to solve this problem, it is necessary to track the photoelectric peak movement in real time, and to automatically search the gain change by setting the lower limit crest selector and the upper limit crest selector.

On the other hand, Korean Patent Laid-Open Publication No. 10-2008-0113012 (entitled "Radiation Detector and Radiation Detection Method") relates to an energy discrimination type radiation detector in which detection sensitivity is uniformized among a plurality of energy regions Discloses a method of discriminating and detecting a plurality of energy regions according to the energy of radiation that is incident on the radiation detecting portion.

Some embodiments of the present invention aim to propose a method and apparatus that can utilize the pattern characteristics of the radiation energy spectrum to search for photoelectric peaks in real time.

According to a first aspect of the present invention there is provided a method for searching for a real time photoelectron peak comprising the steps of receiving a radiation energy value output from a radiation counter, Updating the valley point parameter value on the energy spectrum, setting an initial value of the photovoltaic peak parameter value based on the valley point parameter value, setting the initial value of the photovoltage peak value on the radiation energy spectrum based on the magnitude of the received radiation energy value Wherein the step of updating the valley point variable includes the step of updating the value of the photovoltaic peak value determined in the updating step, Depending on the value of the received radiation energy, if it is included in a range of values as small or as large as the range The step of updating the valley point parameter value and updating the photoelectron peak parameter value may further comprise the step of updating the value of the received radiation energy when the received radiation energy value is included in a range of values smaller or larger than the second search range from the photoelectron peak value. The photoelectric peak parameter value is updated according to the value.

The real-time photoelectrical peak search apparatus according to the second aspect of the present invention further includes a memory for storing a real-time photoelectrical peak search application; And a processor executing a photoelectric peak seeking application. At this time, the processor updates the valley point parameter value on the radiation energy spectrum or updates the photovoltaic peak parameter value on the radiation energy spectrum based on the magnitude of the radiation energy value received from the radiation counter in accordance with the execution of the photoelectrical peak search application , The processor outputs the photovoltaic peak parameter value determined at the time of updating as the photovoltaic peak value when the received radiation energy value is within a range of values smaller or larger than the valley point parameter value by the first search range, The processor updates the valley point parameter value according to the value of the received radiation energy and if the received radiation energy value is within a range of values smaller or larger than the second search range from the photoelectron peak value, Update the peak variable value.

According to any one of the above-mentioned objects of the present invention, an embodiment of the present invention provides a method of real-time photoelectron peak search of a radiation counter, so that the radiation energy resolution and the counter gain can be simply evaluated.

In addition, although the performance of a conventional radiation counter is susceptible to changes in temperature and applied voltage characteristics, a real-time photoelectrical peak search method according to one embodiment of the present invention can instantaneously cope with changes occurring in radiation measurement . In particular, even if there is no additional configuration such as a temperature sensor and an applied voltage controller, it is possible to easily cope with the conventional method using only the radiation detector and the coefficient measurement digital circuit.

1 is a diagram illustrating a method of applying energy of a radiation to a search direction determination according to an embodiment of the present invention.
2 is a conceptual diagram of a real-time photoelectrical peak search apparatus according to an embodiment of the present invention.
3 is a flowchart of a real-time photoelectrical peak search method according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a real-time photoelectrical peak search method according to an embodiment of the present invention.
5 is a diagram illustrating a method of updating a valley point variable according to an embodiment of the present invention.
6 is a diagram illustrating a method of updating a photoelectric peak parameter value according to an embodiment of the present invention.
FIG. 7A is a diagram illustrating a simulation result according to an embodiment of the present invention, and FIG. 7B is a diagram illustrating a result of searching for a photoelectric peak according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

Hereinafter, a real-time photoelectrical peak search method of a radiation counter according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a diagram illustrating a method of applying energy of radiation according to an embodiment to a search direction determination according to an embodiment of the present invention.

Referring to FIG. 1, when a search range of the same size is integrated based on a searching point in a certain function, a direction approaching a minimum point and a maximum point of the function is calculated through a function slope calculated Can be found.

If the dotted line graph of FIG. 1 is the energy distribution of the radiation detected by the counter, then the probability of radiation detection may be proportional to the integral of the search interval. At this time, when the radiation of the energy within the search range is detected, the slope of the radiation energy distribution function can be inferred.

For example, when radiation having an energy between k + m plus search point k and search range m is detected, the maximum point of the radiation energy spectrum function is set in the + direction, i.e., the search range k + m).

In this manner, the photoelectric peak can be searched by monitoring the radiation coefficient in real time by applying a cost function of the gradient method.

That is, the minimum and maximum points of the radiation energy spectrum can be traced through the search point, and the position of the search point can be updated with the energy value of the gamma ray every time the gamma ray is detected.

On the other hand, as shown in the graph, the radiation energy spectrum has a pattern in which the minimum point appears after the scattering radiation band appears, and thereafter the maximum point appears. Here, scattered radiation refers to radiation whose direction is changed by passing through the material by the radiation scattered by the material. In the present invention, a method of searching a minimum point and a maximum point in real time using characteristics of such a pattern is proposed.

2 is a conceptual diagram of a real-time photoelectric peak search apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the real-time photoelectrical peak search apparatus 10 includes a radiation counter 100 for measuring radiation, a real-time photoelectric peak detector (for example, 200, a multi-peak analyzer 300 for analyzing the radionuclides measured in real time by reflecting the measured energy value from the photoelectrical peak searcher 200, and a multi-peak analyzer 300 for controlling the operation of the radiation counter 100, And a central computer 400 for updating the peak parameter value and outputting the result obtained from the multi-peaking analyzer 300. [

The radiation counter 100 is capable of measuring radiation. For example, when radiation comes into contact with a scintillator in a counter, electrons or positons generated by interaction with photoelectric effect, compton effect, electron pair generation, etc. can be excited and detected as a spectrum. In addition, gas detectors and semiconductor detectors can measure radiation by a method in which electrons are obtained from the ionizing action of ions or molecules in the material to ionize when the radiation passes through the material.

The photoelectric peak searcher 200 can analyze the minimum point energy (valley point) and the maximum point energy (photoelectric peak) in real time by receiving the measured radiation energy spectrum from the radiation counter 100.

The multi-peak analyzer 300 can analyze the radionuclides measured in real time. Herein, it can be set as a lower limit peak value analyzer or a upper limit peak value analyzer by using the valley point variable value and photoelectric peak value value analyzed from the photoelectric peak searcher 200.

The central computer 400 may control the radiation counter 100 and the photoelectrical peak searcher 200 and output the analysis results of the multi-peaking analyzer 300. In addition, the central computer 400 may include a memory in which a real-time photoelectric peak seeking application is stored, and a processor executing a photoelectric peak seeking application. The processor at this time can search for the valley point variable and the photoelectron peak value on the radiation energy spectrum received from the radiation counter according to the execution of the photoelectric peak application and update it in real time.

2 refers to a hardware component such as software or an FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and performs predetermined roles .

However, 'components' are not meant to be limited to software or hardware, and each component may be configured to reside on an addressable storage medium and configured to play one or more processors.

Thus, by way of example, an element may comprise components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, Routines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.

The components and functions provided within those components may be combined into a smaller number of components or further separated into additional components.

In addition, each component of the real-time photoelectric peak searching apparatus 10 can be implemented in a separate computer. In particular, the real-time photoelectric peak searcher 200 according to one embodiment of the present invention includes a memory in which a real-time photoelectric peak seeking application is stored, and a processor executing a photoelectric peak seeking application. Also, the photoelectric peak search process can be displayed to the user in real time through a separate display.

In addition, the processor can update the real-time update of the valley-point parameter and the photo-electric-peak parameter value on the radiation energy spectrum received from the radiation counter according to the execution of the photo-electric peak application.

That is, the processor updates the valley point variable value according to the value of the received radiation energy when the received radiation energy value is included in a range of values that is smaller or larger than the valley point variable value by the first search range, And updates the photovoltaic peak parameter value according to the value of the received radiation energy when the received radiation energy value is included in the range of the value smaller or larger than the second search range from the photovoltaic peak parameter value.

In this case, the method of searching for the valley point variable and the photoelectron peak value is performed by setting the search range based on the search point by the principle described above with reference to FIG. 1, and then searching the search point according to the probability of detecting the radiation in the search range And it is possible to search the valley point variable value and the photoelectric peak variable value. Depending on the implementation of the photoelectric peak application, the processor may perform each of the steps described below with reference to FIG.

Next, Fig. 3 is a flowchart of a real-time photoelectrical peak search method according to an embodiment of the present invention.

Referring to FIG. 3, a real-time photoelectron peak search method includes receiving (S300) a radiation energy value output from a radiation counter, updating a valley point variable value on the radiation energy spectrum based on the magnitude of the received radiation energy value (S310), setting an initial value of the photoelectric peak parameter value based on the valley point parameter value (S320), updating the photoelectric peak parameter value on the radiation energy spectrum based on the magnitude of the received radiation energy value (S330 , And outputting the photovoltaic peak parameter value determined in the updating step as a photovoltaic peak value (S340). A more detailed description will be given with reference to Figs. 4 to 6, which will be described later.

4 is a flowchart illustrating a method of searching for a real-time photovoltaic peak according to an embodiment of the present invention. FIG. 5 illustrates a method of updating a valley point variable according to an exemplary embodiment of the present invention And FIG. 6 is a diagram illustrating a method of updating a photoelectric peak parameter value according to an embodiment of the present invention.

In particular, the real-time energy search method shown in FIG. 4 can be implemented through a digital circuit.

The digital circuit at this time includes an OR circuit, a combinational logic circuit, a register, a counting element, a programmable logic array, a programmable array logic, a digital integrated circuit, a field programmable gate array, and the like in which a method of searching a photoelectric peak of a radiation counter in real time is included can do. In particular, as shown in FIG. 4, a digital circuit of the photoelectric peak searching method can be implemented such that a pipe-line process is performed using only two registers and a comparator for storing an integer.

First, receiving the radiation energy value output from the radiation counter (S300) receives the measured radiation energy spectrum from the radiation counter.

In general, the nuclear nuclei that undergo radioactive decay are called radioactive nuclear papers. The type of decay that radionuclide species show is the alpha (α) decay that releases alpha (α) particles, the beta (β ±) decay that releases beta (β ±) particles, the gamma And the like. In Fig. 4, gamma energy is used as an example, but not limited thereto, and it can be used for detection of beta rays and alpha rays.

Next, updating the valley point parameter value on the radiation energy spectrum (S310) based on the magnitude of the received radiation energy value further includes setting an initial valley point value on the radiation energy spectrum can do. At this time, the initial valley point variable value can be set as an average value of the radiation energy spectrum obtained through the radiation counter. Also, as shown in FIG. 5A, the initial valley point variable value is recognized as a searching point and a searching range may be set at a predetermined interval based on the initial valley point variable value .

In this case, when the received radiation energy value is located between the valley point variable and the valley point variable, the value of the valley point variable is set to a first step value (Coarse step (S312).

If the received radiation energy value is located between the valley point variable and the valley point variable (S313), the valley point variable is increased by the first step (S314).

5 (a), 5 (b), and 5 (c), in the case of FIGS. 5 (a) to 5 (g), the initial valley- And explains how to search for points. At this time, it can be assumed that the initial valley point parameter value is located on the left side of the actual valley point is that the initial valley point variable value is located in the energy region band lower than the actual valley point in the radiation energy spectrum.

Referring to FIG. 5A, it can be assumed that the energy region is smaller by the first search range than the initial valley point variable value, and the energy region by the first search range is B.

Next, referring to FIG. 5B, when the radiation having energy of the A band is detected, the initial valley point variable value can be shifted to a higher level by the first step value. Also, referring to FIG. 5 (c), when the radiation having energy of the B band is detected, the initial valley point variable value can be shifted to the energy direction as low as the first step value.

At this time, considering the energy spectrum actually obtained from the radiation counter, since the radiation having the energy of the A band is more likely to be detected than the radiation of the B band, the initial valley point value of the energy spectrum gradually increases to the valley point Can be approached.

5 (d), 5 (e), and 5 (f) illustrate a method of searching for valleys at the probability that the initial valley point variable value is located on the right side of the actual valley point. At this time, the fact that the initial valley point parameter value is located on the right side of the actual valley point can be assumed that the initial valley point variable value is located in the energy region above the actual valley point in the radiation energy spectrum.

Referring to FIG. 5 (d), it can be assumed that the energy region as small as the first search range is A and the energy region as large as the first search range is B based on the initial valley point variable value.

Next, referring to FIG. 5E, when the radiation having energy of the B band is detected, the initial valley point variable value can be shifted to the lower value by the first step value. Also, referring to FIG. 5 (f), when radiation having energy of the A band is detected, the initial valley point variable value can be shifted to an energy direction as high as the first step value.

At this time, considering the energy spectrum actually obtained from the radiation counter, since the radiation having energy of the B band is more likely to be detected than the radiation of the A band, the initial valley point value in the energy spectrum gradually approaches the valley point have.

Next, as shown in (g) of FIG. 5, the initial valley point variable value is continuously updated, and the equilibrium state can be reached by moving until the integrated value of the probability A region and the region B where the radiation is detected becomes the same. At this time, when the gain value of the radiation counter is changed to change the energy spectrum, the valley point parameter value can be updated again and move toward the new valley point value.

If the received radiation energy value is located between the valley point variable value and the valley point variable value, which is larger than the valley point variable value by a value larger than the first search range, the step of updating the valley point variable value in the radiation energy spectrum (S310) Value is decreased by the first step value and the valley point variable value is increased by the first step value when the received radiation energy value is located between the valley point variable value and the valley point variable value by a value smaller than the first search range have. The updated valley point variable value in step S310 may gradually approach the minimum point energy value.

At this time, the first step value can not be set to a large value so that the valley point variable value is updated and exceeds the photoelectrical peak parameter value.

Next, the real-time photoelectrical peak search apparatus 10 sets the initial value of the photoelectric peak parameter value based on the updated valley point variable value from the previous step S310 (S320).

The step S320 of setting the initial value of the photovoltaic peak parameter value is performed when the initial value of the photovoltaic peak point is smaller than the value of the valley point variable by a third step value (S321) And setting the initial value of the photoelectric peak parameter value to a value larger than the valley point variable value by the third step value (S322).

On the other hand, the real-time photoelectric peak search apparatus 10 may update the photoelectric peak parameter value based on the initial value of the photoelectric peak parameter value set from the previous step S320 (S330).

That is, when the received radiation energy value is included in the range of the value smaller or larger than the second search range (Coarse step) from the photovoltaic peak parameter value, the step of updating the photovoltaic peak parameter value (S330) The photoelectric peak parameter value is updated according to the value of the photoelectric peak parameter (S320). The photoelectrical peak variable value updated in step S320 may approach the maximum point energy value.

At this time, if the received radiation energy value is located between the photoelectrical peak value and the photoelectrical peak value by a second search range (S323), the photoelectrical peak value is increased by a second step value (Coarse step) S324).

In addition, when the received radiation energy value is located between the photoelectric peak value and the photoelectric peak value (S325), the photoelectric peak value may be decreased by the second step value (S326) .

Next, the real-time photoelectric peak searching apparatus 10 outputs the photoelectric peak parameter value determined in the preceding step S330 as a photoelectric peak value (S340).

Referring to FIGS. 6A to 6D, the initial photoelectric peak parameter value is recognized as a searching point, and a searching range is determined at a predetermined interval based on the initial photoelectric peak value .

Next, referring to FIG. 6A, it is assumed that an energy region as small as the second search range is defined as A based on the initial photoelectrical peak value, and an energy region as large as the second search range is denoted by B Can be assumed.

Next, referring to FIG. 6 (b), when the radiation having energy of the A band is detected, the initial photoelectric peak parameter value can be shifted to a lower level by the second step value. Referring to FIG. 6 (c), when the radiation having energy of the B band is detected, the initial photoelectric peak parameter value can be shifted to the energy direction as high as the second step value. Considering the energy spectrum actually obtained from the radiation counter, the initial photoelectric peak parameter value on the energy spectrum gradually increases to the maximum point of the photoelectric peak (since the radiation with energy of the B band is more likely to be detected more frequently than the radiation of the A band Maximum).

Next, as shown in (d) of FIG. 6, the search point is continuously updated to move to the equilibrium state until the integrated values of the probability A region and the B region where the radiation is detected are equal to each other. However, if the gain value of the radiation counter changes and the energy spectrum changes, the initial photoelectric peak parameter value can be updated and moved toward the new photoelectric peak parameter value.

Meanwhile, FIG. 7A is a diagram showing a simulation result of an algorithm according to an embodiment of the present invention, and FIG. 7B is a diagram showing a result of searching for a photoelectric peak according to an embodiment of the present invention .

Referring to FIG. 7A, the dashed line is the energy spectrum of the simulated F-18 radiation source, the square markers represent the distribution of the first search range in which the valley point variable value between the photoelectric peak and the scattering radiation energy is found, The marker represents the second search range distribution of the detected photoelectric peak. Referring to FIG. 7 (b), the result of searching the photoelectric peak by the method developed in the present invention can be seen using raw data obtained by a radiation counter and a Na-22 radiation source.

Meanwhile, as described in the prior art, the real-time photoelectrical peak search method can detect the photoelectric peak in real time in the radiation counter, and immediately cope with the performance change of the radiation counter in the setting of the wave detector for detecting the radiation.

For example, in the case of a radiation source having a photoelectric peak of 511 keV, when the desired energy band is 300 to 600 keV, the lower peak detector is multiplied by 300/511 to the photoelectric peak energy channel, and the upper peak detector is 600 / Lt; RTI ID = 0.0 > 511. ≪ / RTI >

Such real-time photoelectrical peak search methods can be used in various ways, among which x-ray imaging apparatuses combining digital circuits and radiation counters and computer tomography, gamma ray cameras, single photon tomography, positron emission tomography, radiotherapy, It can be applied to radiation medical devices and nuclear medicine devices such as counters, well type counters, dosimeters, and radiation alarms.

Particularly, the real-time photoelectrical peak search method according to an embodiment of the present invention can be applied to a radiation camera or a medical instrument using a counting method which can have a large number of sensors.

The method of real-time photoelectrical peak search according to an embodiment of the present invention can also be implemented in the form of a recording medium including instructions executable by a computer such as a program module executed by a computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium can include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: Real-time photoelectric peak search device
100: Radiation counter
200: Real-time photoelectric peak searcher
300: Multi-peaking analyzer
400: central computer

Claims (11)

In a real-time photoelectric peak searching method,
Receiving a radiation energy value output from the radiation counter;
Updating a valley point parameter value on the radiation energy spectrum based on the magnitude of the received radiation energy value;
Setting an initial value of a photoelectric peak parameter value based on the valley point variable;
Updating a photoelectron peak parameter value on the radiation energy spectrum based on the magnitude of the received radiation energy value; And
And outputting the photovoltaic peak value determined in the updating step as a photovoltaic peak value,
The step of updating the valley point parameter value may further include the step of, when the received radiation energy value is included in a range of values smaller or larger than the valley point variable value by a first search range, Update the variable value,
Wherein the step of updating the photoelectric peak parameter value comprises the step of, when the received radiation energy value is included in a range of values smaller or larger than the photoelectron peak parameter value by a second search range, A method for real - time photoelectrical peak search for updating a variable value. The method according to claim 1,
Wherein the step of updating the valley point parameter value comprises: if the received radiation energy value is located between the valley point variable value and the valley point variable value, ≪ / RTI >
Wherein when the received radiation energy value is located between the valley point variable value and the valley point variable value, the valley point variable value is increased by a first step value. . 3. The method of claim 2,
The step of updating the valley point variable value
Setting an initial valley point variable value on the radiation energy spectrum,
Wherein the initial valley point parameter value is set to an average value of the radiation energy spectrum. The method according to claim 1,
The step of updating the photovoltaic peak parameter value
And increasing the photovoltaic peak parameter value by a second step value when the received radiation energy value is located between the photovoltaic peak parameter value and the photovoltaic peak parameter value by a second search range,
When the received radiation energy value is located between the photovoltaic peak parameter value and the photovoltaic peak parameter value and a value smaller than the photovoltaic peak parameter value by a second search range, the photovoltaic peak parameter value is decreased by a second step value. . The method according to claim 1,
The step of setting the initial value of the photoelectric peak parameter value
When the initial value of the photovoltaic peak parameter value is smaller than the value of the valley point variable value by a third step value, the initial value of the photovoltaic peak parameter value is set to a value larger than the valley point variable value by a third step value ≪ / RTI >
And updates the photoelectric peak parameter value based on the initial value of the set photoelectric peak parameter value. A computer-readable recording medium recording a program for performing the method according to any one of claims 1 to 5 on a computer. A real-time photoelectric peak searching apparatus comprising:
A memory in which a real-time photoelectric peak searching application is stored; And
And a processor for executing the photoelectric peak seeking application,
The processor, upon execution of the photoelectrical peak searching application,
Updating a valley point parameter value on the radiation energy spectrum or updating a photovoltaic peak parameter value on the radiation energy spectrum based on the magnitude of the radiation energy value received from the radiation counter,
And outputting the photovoltaic peak value determined at the time of the update as a photovoltaic peak value,
Wherein the processor updates the valley point variable according to a value of the received radiation energy when the received radiation energy value is included in a range of a value smaller or larger than a valley point variable value by a first search range,
Wherein the processor updates the photovoltaic peak parameter value according to a value of the received radiation energy when the received radiation energy value is included in a range of values that is smaller or larger than the photovoltaic peak parameter value by a second search range Real time photoelectric peak search device. 8. The method of claim 7,
The processor
When the received radiation energy value is located between the valley point variable value and the valley point variable value by a first search range, the valley point variable value is decreased by a first step value,
Wherein when the received radiation energy value is located between the valley point variable value and the valley point variable value by a value smaller than a first search range, the valley point variable value is increased by a first step value. . 9. The method of claim 8,
The processor
Further comprising setting an initial valley point variable value on the radiation energy spectrum,
Wherein the initial valley point parameter value is set to an average value of the radiation energy spectrum. 8. The method of claim 7,
The processor
And increasing the photovoltaic peak parameter value by a second step value when the received radiation energy value is located between the photovoltaic peak parameter value and the photovoltaic peak parameter value by a second search range,
Wherein the photon-to-peak parameter value is decreased by a second-step value when the received radiation energy value is located between the photon-to-peak parameter value and the photon-to- . 8. The method of claim 7,
The processor
When the initial value of the photovoltaic peak parameter value is smaller than the value of the valley point variable value by a third step value, the initial value of the photovoltaic peak parameter value is set to a value larger than the valley point variable value by a third step value ≪ / RTI >
And updates the photovoltaic peak parameter value based on the initial value of the set photovoltaic peak parameter value.

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