CN207020320U - A kind of gain correcting device of scintillation detector - Google Patents
A kind of gain correcting device of scintillation detector Download PDFInfo
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- CN207020320U CN207020320U CN201720906974.5U CN201720906974U CN207020320U CN 207020320 U CN207020320 U CN 207020320U CN 201720906974 U CN201720906974 U CN 201720906974U CN 207020320 U CN207020320 U CN 207020320U
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Abstract
The utility model provides a kind of gain correcting device of scintillation detector, the device penetrates source and at least two-way comparator, counting module, temperature sensor and one chip microcomputer including calibration, is communicated to connect per comparator all the way with photoelectric device so that the analog voltage signal of different-energy section is converted into digital pulse signal；Counting module per comparator all the way respectively with communicating to connect and measuring the counting rate of digital pulse signal simultaneously；Temperature sensor surveys scintillation detector surface temperature data；One chip microcomputer communicates to connect with counting module and calculates target gain and correction voltage according to counting rate and observed temperature data；High voltage power supply is connected with one chip microcomputer to receive correction voltage, and high voltage power supply is also connected with photoelectric device to realize the gain calibration of photoelectric device according to correction voltage.The utility model can avoid loss of learning, accelerate calibration speed, improve the efficiency of gain calibration according to the direct adjust gain of temperature.
Description
Technical field
It the utility model is related to a kind of signal correction device in nuclear medicine field and ionizing radiation measurement field
And method, relate more specifically to a kind of gain correcting device of scintillation detector.
Background technology
Scintillation detector is widely used in nuclear medicine and ionizing radiation measurement field, is implemented as picture or actinometry
Core devices.Scintillation detector includes the scintillation crystal and photoelectric device that intercouple, and scintillation crystal is to by ionising radiation
Ray (including X ray, gammaphoton, neutron, α photons and β photons etc.) is converted to optical signal, and photoelectric device is the light to be believed
Number electric signal is converted to, by that can get corresponding arrival time after corresponding electronics design treatment electric signal, arrive
Up to information such as the energy of position and gammaphoton.Currently used scintillation crystal includes sodium iodide (NaI) crystal, yttrium luetcium silicate
(LYSO) crystal, silicic acid lutetium (LSO) crystal, yttrium silicate (YSO) crystal and cesium iodide (CsI) crystal etc., conventional photoelectric device
There are photodiode (APD), photomultiplier (PMT) and emerging silicon photoelectric multiplier (SiPM) etc..
Because scintillation detector is implemented as the core devices of picture or actinometry, its gain parameter will directly affect radiation
The accuracy of measurement.However, due to the individual light output of scintillation crystal, (light output refers to the electricity of scintillation crystal absorbance units energy
From the quantity that ray is converted to photon) between have differences, this species diversity will cause the change in gain of scintillation detector, especially
It is the scintillation detector using silicon photoelectric multiplier as photoelectric device, its gain is to temperature extreme sensitivity, in -20~50 DEG C of temperature models
More than 56% can be differed by enclosing lower gain, have a strong impact on the accuracy of system.Therefore, needed in actual use to scintillation detector
Gain is corrected.
At present, the method that the gain to scintillation detector is corrected is mostly to increase amplifier in scintillation detector rear end,
And using the power spectrum of multi-channel analysis device measuring scintillation detector, so as to obtain the photoelectricity peak position that source is penetrated in test, then with photoelectricity
Gain of the peak position as scintillation detector, caused by adjusting the gain of amplifier to make up scintillation detector change in gain
Influence, make the holding of photoelectricity peak position constant to realize the calibration of gain.
Although the signal of output can be carried out secondary amplification by prior art by increasing amplifier in scintillation detector rear end
To realize gain calibration, still, due to there is relatively-stationary of amplitude using the scintillation detector itself of silicon photoelectric multiplier
Back noise signal, when the gain of silicon photoelectric multiplier declines, the signal of part output will drown out in background noise signal, i.e.,
Make to increase amplifier in rear end, its signal to noise ratio can't also improve, and ultimately result in loss signal message.Secondly, using amplifier
Afterwards, it is necessary to which measuring calibration penetrates the complete power spectrum in source, and its photoelectricity peak position is obtained to realize calibration, its usual data acquisition amount
Not less than 5000 events, this will cause system calibration speed slow, hardware cost increase.Again, after using amplifier, temperature is worked as
Need to repeat calibration measurement flow during change, calibration efficiency reduces.
Utility model content
The purpose of this utility model is to provide a kind of gain correcting device of scintillation detector, so as to solve in the prior art
The problem of gain calibration speed of scintillation detector is slow, calibration efficiency is low and cost is higher.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is to provide a kind of gain school of scintillation detector
Equipment, meet gain temperature voltage equation G (x, t)=at+bx+c between the gain G of scintillation detector, temperature t and voltage x,
Wherein parameter a, b, c is constant；The gain correction approach comprises the following steps：
The first step, the gain temperature voltage equation of standard scintillation detector is determined, is concretely comprised the following steps：
Step S1：A standard scintillation detector is taken, in temperature T0With voltage X0The standard scintillation is measured in the case of fixation
The gain G of detector0, by the gain G of the standard scintillation detector0Target gain as scintillation detector to be measured；
Step S2：Temperature is fixed as T0, voltage is adjusted to X2, measure the gain G of the standard scintillation detector2, generation
Enter the gain temperature voltage equation, parameter k is calculated2And p2, wherein k2=b, p2=at0+c；
Step S3：Voltage is fixed as X0, it is adjusted to T1, the gain G of measurement standard scintillation detector1, substitute into institute
Gain temperature voltage equation is stated, parameter k is calculated1And p1, wherein, k1=a, p1=bx0+c；
Step S4：By parameter k1, k2、p1And p2The gain temperature voltage equation is substituted into, standard scintillation detection is calculated
Parameter a, b and c of device, so that it is determined that the gain temperature voltage equation of standard scintillation detector is：
G (x, t)=at+bx+c
Step S5：When target gain is G0When, the electricity of the scintillation detector is can determine that according to gain temperature voltage equation
Pressure x and temperature t between relation be：
X=(G0-at-c)/b
Second step, the gain inequality of scintillation detector to be measured and the standard scintillation detector is measured, obtain flicker to be measured and visit
Survey voltage temperature equation of the device under the conditions of the target gain；
3rd step, the reference using the voltage temperature equation obtained in the second step as correction, visited according to flicker to be measured
Corresponding correction voltage is calculated in the observed temperature for surveying device, changes the voltage of the scintillation detector according to the correction voltage
To realize the gain calibration of scintillation detector to be measured.
Second step comprises the following steps that：
Step S6：Adjustment temperature is T0, voltage X0, measure scintillation detector to be measured gain G ', then flash detection to be measured
The gain temperature voltage equation of device is：
G (x, t)=at+bx+c+ (G'-G0)；
Step S7：When target gain is G0When, the voltage temperature equation of scintillation detector to be measured is：
X=(- at-c+2G0-G')/b。
According to one embodiment of the present utility model, the actual measurement on scintillation detector surface to be measured is obtained using temperature sensor
Temperature, the corresponding correction voltage is calculated using one chip microcomputer.
For the scintillation detector of same size same specification, the first step need to only perform once, other scintillation detectors to be measured
Second step is performed to obtain the voltage temperature equation under target gain.
The gain correcting device of scintillation detector provided by the utility model, scintillation detector include the flicker to intercouple
Crystal and photoelectric device, gain correcting device include：Source is penetrated in calibration, and the scintillation crystal receives the calibration and penetrates the electricity that source is sent
Visible ray is converted to from radiation ray and by the ionising radiation ray, the visible ray is converted to simulation by the photoelectric device
Voltage signal；At least two-way comparator, communicated to connect per comparator described all the way with the photoelectric device with by different-energy
The analog voltage signal of section is converted to digital pulse signal；Counting module, the counting module respectively with per described all the way
Comparator communication connection measures institute simultaneously to receive per the digital pulse signal that the comparator is sent all the way, the counting module
State the counting rate of digital pulse signal；Temperature sensor, the temperature sensor be arranged at the photoelectric device outer surface with
Observed temperature data；One chip microcomputer, the one chip microcomputer are communicated to connect to receive with the counting module
Counting rate is stated, the one chip microcomputer is also connected with the temperature sensor communication to receive the observed temperature data,
The one chip microcomputer calculates target gain and correction voltage according to the counting rate and the observed temperature data；With
And high voltage power supply, the high voltage power supply are connected with the one chip microcomputer to receive the correction voltage, the high-tension electricity
Source is also connected with the photoelectric device to realize the gain calibration of the photoelectric device according to the correction voltage.
Source is penetrated in calibration can penetrate source using single.
Calibration penetrates radionuclide that source uses as Cs-137, Co-60 or Eu-152.
When being calibrated to scintillation detector of the same race, the relative position that the calibration is penetrated between source and the scintillation crystal is protected
Hold fixation.
Multichannel comparator includes two-way comparator, the two-way comparator respectively with the photoelectric device and the calculating mould
Block communicates to connect.
Photoelectric device is silicon photoelectric multiplier.
The gain correcting device of scintillation detector provided by the utility model, can directly it be increased from scintillation detector end
Benefit calibration, solves the problems, such as loss of learning, substitutes multi-channel analyzer using multichannel comparator, simplifies the measurement of calibration process
Device requirement, accelerate calibration speed.Meanwhile the utility model establishes gain and temperature, the number of voltage of scintillation detector
Model is learned, the efficiency of gain calibration without remeasuring, can be improved according to the direct adjust gain of temperature.
Brief description of the drawings
Fig. 1 is shown according to the energy subsection of the gain correcting device of the scintillation detector of one embodiment of the present utility model
It is intended to；
Fig. 2 is gain and the temperature of the gain correcting device according to the scintillation detector of one embodiment of the present utility model
Relation schematic diagram；
Fig. 3 is the correction stream according to the gain correcting device of the scintillation detector of a preferred embodiment of the present utility model
Journey schematic diagram；
Fig. 4 is illustrated according to the system of the gain correcting device of the scintillation detector of one embodiment of the present utility model
Figure；
Fig. 5 is the multichannel comparator according to the gain correcting device of the scintillation detector of one embodiment of the present utility model
Arrangement schematic diagram.
Embodiment
Below in conjunction with specific embodiment, the utility model is described further.It should be understood that following examples are only used for
Bright the utility model is not for limitation the scope of the utility model.
Power spectrum in the utility model refers to the energy and quantity information that ionising radiation ray is obtained using scintillation detector, and
The Energy distribution histogram drawn with energy subsection.Each, which penetrates source, can all send the ionising radiation ray of several fixed energies,
Therefore each, which penetrates source, relatively-stationary power spectrum form.According to n different energy limit value EnIf power spectrum is divided into
A dry energy section, then the ratio of unit interval all pulsimeter digit rate is energy channel counting rate ratio in each energy section, than
Such as use 3 energy limit value E1、E2、E3Power spectrum is divided into three energy sections, the section of these three energy sections is respectively [E1,
E2)、[E2, E3)、[E3,+∞), the counting rate in three energy sections is respectively CR1、CR2、CR3, then energy channel counting rate ratio be
CR1:CR2:CR3.For determine size scintillation crystal, its be also for the power spectrum form of the same race for penetrating source it is relatively-stationary, i.e., respectively
The counting rate ratio of energy channel is stable, therefore the gross-count rate of different-energy section is than being also stable.Based on principles above,
The counting rate ratio of the different comparator record different-energy section of any two backward voltage can be used, in this, as the ginseng of calibration
Examine standard, and the gain using the ratio of the different counting rates as the photoelectric device of scintillation detector.Specifically, such as Fig. 1 institutes
Show, Cs-137 power spectrum can be divided into two energy sections, and as shown in dotted line segmentation in figure, flicker is can determine that by above-mentioned principle
The gain of the photoelectric device of detector is：
G=CountRate2/CountRate1
Wherein, CountRate refers to the counting rate that the comparator of different passages is recorded, CountRate1 be energy limit value compared with
The counting rate of low comparator 1, CountRate2 are the counting rate of the higher comparator 2 of energy limit value.
Further, Fig. 2 is gain and the temperature of the scintillation detector according to a preferred embodiment of the present utility model
Relation schematic diagram, as shown in Figure 2, according to actual measured results, the gain of photoelectric device and temperature are in that once linear closes substantially
System, gain and voltage are also in once linear relationship, therefore, meet equation below between gain G and temperature t, voltage x：
G (x, t)=at+bx+c (1)
Wherein, a is temperature coefficient, and b is voltage coefficient, and c is determined to be unrelated with voltage and temperature by scintillation detector property
Fixed gain deviation constant, such as light loss etc. caused by scintillation crystal and photoelectric device coupling.
It is that the correction in temperature range can be achieved to obtain a, b, c by the relation measurement of formula (1), specific as follows：
First, as temperature t0When fixed, it can obtain
G(x,t0)=k2x+p2 (2)
Wherein, k2=b, p2=at0+c；
Second, as voltage x0When fixed, it can obtain
G(x0, t) and=k1t+p1 (3)
Wherein, k1=a, p1=bx0+c。
According to relation above, understood with reference to Fig. 3, the step of the utility model carries out gain calibration is as follows：
The first step, the gain temperature voltage equation of standard scintillation detector is determined, to realize gain at different temperatures
Correction, is concretely comprised the following steps：
S1：A standard scintillation detector is taken, in temperature T0With voltage X0Measurement standard scintillation detector in the case of fixation
Gain G0, by the gain G of standard scintillation detector0Target gain as other scintillation detectors to be measured；
S2：Temperature is fixed as T0, voltage is adjusted to X2, the gain G of measurement standard scintillation detector2, substitute into above
Formula (2), parameter k is calculated2And p2；
S3：Voltage is fixed as X0, it is adjusted to T1, the gain G of measurement standard scintillation detector1, substitute into above
Formula (3), parameter k is calculated1And p1；
S4：By parameter k1, k2、p1And p2Formula (1) above is substituted into, parameter a, b of standard scintillation detector is calculated
And c, so that it is determined that the gain temperature voltage equation of standard scintillation detector is：
G (x, t)=at+bx+c (1)
S5：When target gain is G0When, the relation between the voltage x of scintillation detector and temperature t can determine that according to above formula
For：
X=(G0-at-c)/b
Second step, scintillation detector to be measured and standard scintillation detector are measured under the sample condition of standard scintillation detector
Gain inequality, obtain voltage temperature equation of the scintillation detector to be measured under the conditions of fixed target gain；Sample strip herein
Part refers to temperature T fixed in the first step0With voltage X0, comprise the following steps that：
S6：Adjustment temperature is T0, voltage X0, measure scintillation detector to be measured gain G ', then scintillation detector to be measured
Gain temperature voltage equation is：
G (x, t)=at+bx+c+ (G '-G0)
S7：When target gain is G0When, the voltage temperature equation of scintillation detector to be measured is：
X=(- at-c+2G0-G')/b
3rd step, according to the gain inequality of the scintillation detector to be measured actually measured and standard scintillation detector, by step S7
Reference of the voltage temperature equation of middle acquisition as correction, the temperature computation surveyed using temperature sensor obtain corresponding correction
Voltage, one chip microcomputer (MCU) control high voltage power supply to change voltage to realize scintillation detector to be measured according to correction voltage
Correction.
For the scintillation detector of same size same specification, the first step need to only perform once, namely step S1-S5 only needs to perform
Once, other scintillation detectors to be measured, which only need to sequentially perform subsequent step (S6-S7), can obtain voltage under target gain
Temperature equation.
It should be noted that there may be error between the gain actually measured in actual use and target gain, pass through
After step S6-S7 determines the voltage and temperature relation of scintillation detector to be measured, correction voltage is calculated by MCU and controls high pressure
Voltage is corrected after voltage output calibrated, can be by performing step S6 test constantly gains, and passes through step S7 and mesh
Mark gain is compared, if the gain after correction does not meet target gain, is repeated step S6-S7 and is re-started tune
It is whole, until reaching the scope of requirement；If the gain after correction meets target gain, next flash detection to be measured is carried out automatically
The gain calibration of device.
Therefore, illustrated according to above-mentioned principle, the system of the gain correcting device of scintillation detector provided by the utility model
For figure as shown in figure 4, as shown in Figure 4, the gain correcting device of scintillation detector 10 of the present utility model penetrates source 20, more including calibration
Road comparator 30, counting module 40, one chip microcomputer (MCU) 50, high voltage power supply 60 and temperature sensor 70, wherein,
Scintillation detector 10 includes the scintillation crystal 11 and photoelectric device 12 to intercouple；Source 20 is penetrated in calibration can penetrate source using single, such as
Cs-137, calibration penetrate source 20 and send ionising radiation ray, such as X ray, gammaphoton, neutron, α photons and β photons etc.；Flicker
Crystal 11 receives calibration and penetrates the ionising radiation ray that source 20 is sent and the ionising radiation ray is converted into visible ray, brilliant with flicker
The photoelectric device 12 that body 11 couples receives the visible ray and the visible ray is converted into analog voltage signal；Multichannel comparator 30 with
Photoelectric device 12 communicates to connect and received the analog voltage signal for coming from photoelectric device 12, and multichannel comparator 30 is according to different
Energy section, which is set, to be converted to digital pulse signal by analog voltage signal and sends to counting module 40；Counting module 40 and multichannel
Comparator 30 is communicated to connect to receive digital pulse signal, and counting module 40 simultaneously send out in cooling water of units of measurement time by multichannel comparator 30
The quantity of the digital pulse signal sent, namely counting rate, then the counting rate is sent to MCU50；Temperature sensor 70 is set
In the surface of photoelectric device 12 accurately to measure the real time temperature on the surface of photoelectric device 12, temperature sensor 70 is by measurement
Real time temperature data are sent to MCU50；The counting rate number for each road comparator 30 that MCU50 is sent according to the counting module 40 of reception
Target gain is obtained according to being calculated, while correction voltage is calculated according to voltage temperature equation and real time temperature data,
MCU50 sends adjustment order to high voltage power supply 60 to be adjusted to voltage to calibrate required voltage after determining correction voltage, so as to complete
Into calibration, the progress of calibration operation is controlled.
More specifically, Fig. 5 is the gain correcting device according to the scintillation detector of one embodiment of the present utility model
The common n roads of the arrangement schematic diagram of multichannel comparator, wherein comparator, photoelectric device 12 communicate to connect with multichannel comparator 30 respectively,
I.e. photoelectric device 12 respectively with first comparator 31, the second comparator 32 ..., and the n-th comparator communication connection, first ratio
Compared with device 31, the second comparator 32 ..., and the n-th comparator communicates to connect with counting module 40 respectively.Because power spectrum is by n
Different energy limit values is divided into several energy sections, accordingly believes the simulation numeral in each energy section per comparator all the way
Number be converted to digital pulse signal, the digit pulse letter that counting module 40 is sent in cooling water of units of measurement time per comparator all the way simultaneously
Number quantity and the counting rate data of each passage are sent to MCU50, energy channel counting rate ratio is determined by MCU, and then
Determine target gain.
According to a preferred embodiment of the present utility model, multichannel comparator 30 is only with the different ratio of two backward voltages
Compared with device 31,32, the counting rate ratio of different-energy section is recorded by counting module 40, in this, as the normative reference of calibration, and
The gain that the ratio of the different counting rates is used as to scintillation detector by MCU is corrected.
It should be noted that because reflection and the folding that the ionising radiation ray that source 20 sends is vulnerable to surrounding objects are penetrated in calibration
Penetrate, this will have influence on the form of the power spectrum of scintillation crystal measurement, therefore, it may be desirable to avoid calibration is penetrated between source 20 and scintillation crystal 11
There is the larger object of density to stop, such as metallic plate etc..Simultaneously it is further noted that the phase that calibration is penetrated between source 20 and scintillation crystal 11
Fixed should be kept to position, when being calibrated to scintillation detector of the same race, calibration is penetrated relative between source 20 and scintillation crystal 11
Position should be also consistent, and otherwise will cause calibration error.
According to one embodiment of the present utility model, source 20 is penetrated in calibration can penetrate source using single, for example, Cs-137, Co-60 or
Person Eu-152, is not necessarily Cs-137, because the power spectrum that list can penetrate source is relatively simple, can obtain more stable passage
Count ratio.It should be appreciated that source is penetrated in calibration of the present utility model it is not limited to that singly source can be penetrated, can is also other kinds of penetrate
Source.
According to a preferred embodiment of the present utility model, photoelectric device 12 is using silicon photoelectric multiplier (SiPM), temperature
Sensor 70 is close to SiPM installations；Temperature sensor 70 be also mountable to the shell of photoelectric device, SiPM bottom surfaces pcb board on or
Person SiPM side.
The gain correcting device of scintillation detector provided by the utility model, gain school can be realized from scintillation detector end
Just, it ensure that scintillation detector signal to noise ratio under the conditions of the scintillation crystal of different temperature and different performance is constant, visit flicker
The energy detection lower limit surveyed after device calibration is constant, maintains the integrality of information.The utility model uses two-way or multichannel ratio
Multichannel analyzer is replaced compared with device and counter, it is not necessary to measures the measurement that gain can be achieved in complete power spectrum, it is only necessary to 1000
Event is measurable accurate gain, obtains gain compared to spectroscopy, measurement event quantity declines 80%, and calibration speed is faster.
Meanwhile the utility model establishes the gain of photoelectric device to temperature, the mathematical modeling of voltage, it is only necessary to measures at two temperature
Data, you can realize the correction of complete temperature range, calibration efficiency is higher.
It is above-described, preferred embodiment only of the present utility model, the scope of the utility model is not limited to, this
Above-described embodiment of utility model can also make a variety of changes, such as to gain, temperature, Voltage Establishment in the utility model
Model can be fitted using secondary or higher order function.I.e. every claims according to the present utility model application and say
Simple, the equivalent changes and modifications that bright book content is made, fall within the claims of the utility model patent.This reality
What it is with new not detailed description is routine techniques content.
Claims (6)
1. a kind of gain correcting device of scintillation detector, the scintillation detector includes the scintillation crystal and photoelectricity to intercouple
Device, it is characterised in that the gain correcting device includes：
Source is penetrated in calibration, and the scintillation crystal receives the calibration and penetrates the ionising radiation ray that source is sent and penetrate the ionising radiation
Line is converted to visible ray, and the visible ray is converted to analog voltage signal by the photoelectric device；
At least two-way comparator, communicated to connect per comparator described all the way with the photoelectric device with by the institute of different-energy section
State analog voltage signal and be converted to digital pulse signal；
Counting module, the counting module per the comparator all the way respectively with communicating to connect to receive per comparator described all the way
The digital pulse signal of transmission, the counting module measure the counting rate of the digital pulse signal simultaneously；
Temperature sensor, the temperature sensor are arranged on the outside of the photoelectric device with observed temperature data；
One chip microcomputer, the one chip microcomputer are communicated to connect to receive the counting rate with the counting module,
The one chip microcomputer is also connected with the temperature sensor communication to receive the observed temperature data, and the monolithic is micro-
Type computer calculates target gain and correction voltage according to the counting rate and the observed temperature data；And
High voltage power supply, the high voltage power supply are connected with the one chip microcomputer to receive the correction voltage, the high pressure
Power supply is also connected with the photoelectric device to realize the gain calibration of the photoelectric device according to the correction voltage.
2. the gain correcting device of scintillation detector according to claim 1, it is characterised in that source use is penetrated in the calibration
List can penetrate source.
3. the gain correcting device of scintillation detector according to claim 2, it is characterised in that source use is penetrated in the calibration
Radionuclide be Cs-137, Co-60 or Eu-152.
4. the gain correcting device of scintillation detector according to claim 1, it is characterised in that to scintillation detector of the same race
When being calibrated, the relative position that the calibration is penetrated between source and the scintillation crystal keeps fixing.
5. the gain correcting device of scintillation detector according to claim 1, it is characterised in that the comparator includes two
Road comparator, comparator described in two-way communicate to connect with the photoelectric device and the counting module respectively.
6. the gain correcting device of scintillation detector according to claim 1, it is characterised in that the photoelectric device is silicon
Photoelectric multiplier.
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| CN201720906974.5U CN207020320U (en) | 2017-07-25 | 2017-07-25 | A kind of gain correcting device of scintillation detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247284A (en) * | 2017-07-25 | 2017-10-13 | 苏州瑞派宁科技有限公司 | The gain correcting device and method of a kind of scintillation detector |
| CN114460623A (en) * | 2020-11-10 | 2022-05-10 | 天津市通透医疗科技有限公司 | SiPM bias control circuit for two-end readout DOI PET |
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2017
- 2017-07-25 CN CN201720906974.5U patent/CN207020320U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247284A (en) * | 2017-07-25 | 2017-10-13 | 苏州瑞派宁科技有限公司 | The gain correcting device and method of a kind of scintillation detector |
| WO2019019451A1 (en) * | 2017-07-25 | 2019-01-31 | 苏州瑞派宁科技有限公司 | Gain correction apparatus and method for scintillation detector |
| CN107247284B (en) * | 2017-07-25 | 2023-09-22 | 苏州瑞派宁科技有限公司 | Gain correction device and method for scintillation detector |
| CN114460623A (en) * | 2020-11-10 | 2022-05-10 | 天津市通透医疗科技有限公司 | SiPM bias control circuit for two-end readout DOI PET |
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