CN106024570B - A kind of PMT property regulations method - Google Patents
A kind of PMT property regulations method Download PDFInfo
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- CN106024570B CN106024570B CN201610319464.8A CN201610319464A CN106024570B CN 106024570 B CN106024570 B CN 106024570B CN 201610319464 A CN201610319464 A CN 201610319464A CN 106024570 B CN106024570 B CN 106024570B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
- H01J43/06—Electrode arrangements
- H01J43/18—Electrode arrangements using essentially more than one dynode
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/208—Circuits specially adapted for scintillation detectors, e.g. for the photo-multiplier section
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a kind of PMT property regulations method, the PMT configurations comprise the following steps in PET, PET CT or PET MR systems：PMT performance data in S1, acquisition time t, PMT actual performance index is calculated accordingly；S2, actual performance index and the difference of standard performance criteria are calculated, judge that difference whether in default normal range (NR), if so, performing S4, otherwise performs S3；S3, the supply voltage according to default supercharging amplitude raising system to PMT, and perform S1 and S2；S4, keep system constant to PMT supply voltage, until reaching regulating time next time；S5, after reaching regulating time next time, repeat S1 S5.The PMT property regulation methods of the present invention effectively improve PMT gain factor, to improve PMT and system performance parameter, by the way of regulating system high pressure is automated, improve operating efficiency.
Description
Technical field
The present invention relates to photodetection field, more particularly to a kind of PMT property regulations method.
Background technology
PMT (photomultiplier, photomultiplier tube) is a kind of vacuum device, it by photo-emissive cathode,
Focusing electrode, dynode and electron collector etc. form, and its main working process is as follows：When illumination is mapped to photocathode,
Photocathode excites photoelectrons into vacuum, and these photoelectrons enter dynode system by focusing electrode electric field, and by further
The multiplication amplification that Secondary Emission obtains, then collects the electronics after amplification as signal output by the use of anode, as a result of two
Secondary transmitting dynode system, so photomultiplier is detecting the photodetector of ultraviolet, visible and near infrared region emittance
In, there is high sensitivity and extremely low noise.In addition, photomultiplier also has, response quickly, cost be low, cathode area
The advantages that big.
Photomultiplier receives the energy of incident photon by negative electrode and is converted into electronics, and (negative electrode is sensitive for its conversion efficiency
Degree) become with the wavelength of incident light.Relation between this photo cathode sensitivity and lambda1-wavelength is called spectral response characteristic.
PMT has high sensitivity and ultrafast time response performance as a staple product in photon technology device,
It is widely used in photon counting, atomic weak light detection, chemiluminescence, bioluminescence research, the detection of extremely low energy-ray, light splitting light
Spend meter, polarimeter, colorimeter, illumination photometer, konimeter, nephelometer, opacimeter, thermoluminescence amount instrument, radio heat meter, scanning electricity
In the instrument and equipment such as mirror and Biochemical Analyzer.
But as the growth of operation hours, PMT performance have declined, so as to cause under equipment overall performance
Drop, in the prior art in the absence of a kind of method for being directed to PMT performances and being adjusted.
The content of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is：There is provided a kind of step simple PMT property regulation sides
Method, PMT gain factor is improved, to improve PMT and place system performance parameter, using the side of automation regulating system high pressure
Formula, releasing field engineer needs the work of the periodically frequent regulation high pressure in scene, reduces human cost, the system work of raising is imitated
Rate.
In order to solve the technical problem in background technology, the invention provides a kind of PMT property regulations method, the PMT
Configuration comprises the following steps in PET system, PET-CT systems or PET-MR systems：
PMT performance data, the actual performance that PMT is calculated according to the performance data refer in S1, acquisition time t
Mark；
S2, the actual performance index and the difference of standard performance criteria are calculated, judge the difference whether in default
Normal range (NR) in, if so, then performing S4, otherwise perform S3；
S3, the supply voltage according to the default supercharging amplitude raising system to PMT, and perform S1 and S2；
S4, keep the system constant to PMT supply voltage, until reaching regulating time next time；
S5, after reaching regulating time next time, repeat S1-S5.
Specifically, the performance data is composed for the light energy distribution of PMT spectral responses, and the actual performance index is in institute
State the summation of the light energy of the PMT conversions in time t.
Further, in step S2, by obtaining the standard as performance test to the PMT of the system after first calibration
Can index.
Specifically, the luminous energy that the performance test converts for the PMT of the system after the test first calibration in time t
Amount.
Preferably, step S4 also includes：The system is stored in CONFIG.SYS to PMT current voltage value
In.
Alternatively, in step S2, the normal range (NR) is the 0%-5% of the standard performance criteria.
Further, in step S1, after host computer sends acquisition instructions to slave computer, the performance is gathered by slave computer
Data.
Specifically, the supercharging amplitude is configured in CONFIG.SYS.
Specifically, the period between the regulating time next time is regulating cycle, and the regulating cycle is in system
Configured in configuration file.
Using above-mentioned technical proposal, PMT property regulation method and steps of the invention are simple, effectively improve PMT gain times
Number, to improve PMT and place system performance parameter, by the way of regulating system high pressure is automated, release field engineer
The work of the periodically frequent regulation high pressure in scene is needed, human cost is reduced, improves system operating efficiency.
Brief description of the drawings
, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical scheme
The accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, right
For those of ordinary skill in the art, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings
Its accompanying drawing.
Fig. 1 is the flow chart of PMT property regulations method provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
Embodiment：Fig. 1 is the flow chart of PMT property regulations method provided in an embodiment of the present invention, it can be seen that
The PMT property regulation methods that the present embodiment provides comprise the following steps：
PMT performance data, the actual performance that PMT is calculated according to the performance data refer in S1, acquisition time t
Mark, sets the t=10min, specially obtains the light energy distribution spectrum of the PMT spectral responses in 10min, calculates in 10min
The summation of the light energy of PMT conversions；
S2, the actual performance index and the difference of standard performance criteria are calculated, judge the difference whether in default
Normal range (NR) in, wherein, the standard performance criteria is by being obtained to the PMT of the system after first calibration as performance test
Arrive, the performance test to the PMT of the system after the first calibration is that the intrinsic property of the PMT to dispatching from the factory is tested, institute
State the system after first calibration and the PMT to dispatch from the factory is as loaded into the initial system calibrated in the system, the performance
Test to test the light energy that the PMT of the system after the first calibration is converted in time t, specific testing procedure is equally to set
Determine 10min testing time, measure the light energy that the PMT of the system after the first calibration is converted within this period
Value, by two light energy values be compared make it is poor, if actually measured light energy value be less than dispatch from the factory test light energy value 95%,
That is actual performance index and the difference of standard performance criteria is above standard the 5% of performance indications, then is determined as that the difference is not located
It is on the contrary then be determined as that the difference is in default normal range (NR) in default normal range (NR), then performing S3, then perform
S4；
S3, the system improved to PMT supply voltage according to default supercharging amplitude, every time carry the supply voltage
High certain amplitude, the supercharging amplitude can be configured in CONFIG.SYS, for example, it can be set to the 5V that pressurizes every time, and
S1 and S2 is performed, after judging to pressurize to PMT, whether the actual performance index of the PMT meets performance requirement；
S4, the difference are in default normal range (NR), then keep the system constant to PMT supply voltage, directly
To arrival regulating time, while current voltage value is recorded in CONFIG.SYS next time；
S5, after reaching regulating time next time, return to S1 and continue executing with, with the time between the regulating time next time
At intervals of a regulating cycle, the regulating cycle is configured in CONFIG.SYS, for example sets regulating cycle T as 30
My god, after 30 days, S1-S5 is repeated, that is, returns to the step of S1 continues executing with above-mentioned PMT property regulations method.
In the present embodiment, the PMT is arranged in PET-CT systems, is specially arranged on the detection of the PET-CT systems
In passage.
Further, whole PMT property regulations method is controlled by control device, starts following functions within such as one month：
Host computer notice slave computer takes the single data of PMT performance parameters in certain time t, is analyzed after adopting data by host computer
System actual performance index is drawn, and is compared with standard performance criteria, when in normal range (NR), is taken no action to；When
When not in normal range (NR), host computer notice lower computer system hydraulic performance decline, start automatic regulating function, slave computer is with nV step
Enter and lift high pressure, and notify host computer to adopt number, often adopt a data, analysis result is simultaneously compared with standard performance criteria, directly
In to performance indications lifting to normal range (NR), slave computer records this high-voltage value, and is stored in configuration file.
Setting in the present embodiment to time t, supercharging amplitude, regulating cycle T and normal range (NR) is not especially limited, with
The setting value made in upper embodiment can not limit protection scope of the present invention, and user can rationally be set according to actual conditions
Put.
The PMT property regulation methods of the present invention are applied also in PET system or PET-MR systems.
The PMT property regulation method and steps of the present invention are simple, PMT gain factor effectively improved, to improve PMT and place
The performance parameter of system, by the way of regulating system high pressure is automated, releasing field engineer needs periodically scene is frequent to adjust
The work of high pressure is saved, human cost is reduced, improves system operating efficiency.
Above disclosed is only several preferred embodiments of the present invention, can not limit the present invention's with this certainly
Interest field, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (4)
1. a kind of PMT property regulations method, in PET system, PET-CT systems or PET-MR systems, it is special for the PMT configurations
Sign is, comprises the following steps：
PMT performance data in S1, acquisition time t, PMT actual performance index, institute are calculated according to the performance data
State the light energy distribution that performance data is PMT spectral responses to compose, the actual performance index turns for the PMT in the time t
The summation of the light energy of change；
S2, calculate the actual performance index and the difference of standard performance criteria, judge the difference whether in it is default just
In normal scope, if so, then performing S4, S3 is otherwise performed, wherein, by making performance test to the PMT of the system after first calibration
The standard performance criteria is obtained, the performance test converts to test the PMT of the system after the first calibration in time t
Light energy；
S3, the supply voltage according to the default supercharging amplitude raising system to PMT, and S1 and S2 are performed, the supercharging width
Value is configured in CONFIG.SYS；
S4, keep the system constant to PMT supply voltage, until reaching regulating time next time；
S5, after reaching regulating time next time, S1-S5 is repeated, wherein, with the time between the regulating time next time
Section is regulating cycle, and the regulating cycle is configured in CONFIG.SYS.
2. PMT property regulations method according to claim 1, it is characterised in that step S4 also includes：By the system pair
PMT current voltage value is stored in CONFIG.SYS.
3. the PMT property regulation methods according to any one in claim 1-2, it is characterised in that described in step S2
Normal range (NR) is the 0%-5% of the standard performance criteria.
4. PMT property regulations method according to claim 3, it is characterised in that in step S1, in host computer to slave computer
After sending acquisition instructions, the performance data is gathered by slave computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610319464.8A CN106024570B (en) | 2016-05-13 | 2016-05-13 | A kind of PMT property regulations method |
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| CN201610319464.8A CN106024570B (en) | 2016-05-13 | 2016-05-13 | A kind of PMT property regulations method |
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| CN106024570A CN106024570A (en) | 2016-10-12 |
| CN106024570B true CN106024570B (en) | 2018-02-27 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101292174A (en) * | 2005-10-17 | 2008-10-22 | 皇家飞利浦电子股份有限公司 | Pmt gain and energy calibrations using lutetium background radiation |
| CN201449977U (en) * | 2009-06-09 | 2010-05-05 | 西北核技术研究所 | Photomultiplier tube linear parameter debugging device |
| CN103675886A (en) * | 2012-09-14 | 2014-03-26 | 赛默飞世尔科技有限公司 | Scintillation detector gain control |
| CN104955239A (en) * | 2015-07-06 | 2015-09-30 | 北京东方安杰科技有限公司 | System and method for continuously detecting light energy of light source |
| CN105342633A (en) * | 2015-10-10 | 2016-02-24 | 沈阳东软医疗***有限公司 | PMT (photomultiplier tubes) gain regulating method and device |
| CN105467422A (en) * | 2014-09-12 | 2016-04-06 | 北京大基康明医疗设备有限公司 | Photomultiplier debugging device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015173203A1 (en) * | 2014-05-11 | 2015-11-19 | Target Systemelektronik Gmbh & Co. Kg | Gain stabilization of photomultipliers |
-
2016
- 2016-05-13 CN CN201610319464.8A patent/CN106024570B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101292174A (en) * | 2005-10-17 | 2008-10-22 | 皇家飞利浦电子股份有限公司 | Pmt gain and energy calibrations using lutetium background radiation |
| CN201449977U (en) * | 2009-06-09 | 2010-05-05 | 西北核技术研究所 | Photomultiplier tube linear parameter debugging device |
| CN103675886A (en) * | 2012-09-14 | 2014-03-26 | 赛默飞世尔科技有限公司 | Scintillation detector gain control |
| CN105467422A (en) * | 2014-09-12 | 2016-04-06 | 北京大基康明医疗设备有限公司 | Photomultiplier debugging device |
| CN104955239A (en) * | 2015-07-06 | 2015-09-30 | 北京东方安杰科技有限公司 | System and method for continuously detecting light energy of light source |
| CN105342633A (en) * | 2015-10-10 | 2016-02-24 | 沈阳东软医疗***有限公司 | PMT (photomultiplier tubes) gain regulating method and device |
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| CN106024570A (en) | 2016-10-12 |
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Effective date of registration: 20191204 Address after: Room 2201, 22 / F, building C3, future technology building, No. 999, Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Patentee after: Wuhan Lianying Life Science Instrument Co., Ltd Address before: 201807 Shanghai City, north of the city of Jiading District Road No. 2258 Patentee before: Shanghai United Imaging Healthcare Co., Ltd. |
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