CN106405618A - Cherenkov radiation detection method and apparatus - Google Patents
Cherenkov radiation detection method and apparatus Download PDFInfo
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Abstract
Provided is a Cherenkov radiation detection method. The method comprises placing a photodetector array, reading the photon counting and each counting time of Cherenkov photons emitted by charged particles to a detector module; performing time coincidence on the read time; and estimating the occurring position of the Cherenkov event according to the relative position of the photon in a hole. Provided is a Cherenkov radiation detection apparatus including a photodetector module, a multi-event time coincidence module, and a Cherenkov event estimation module. The Cherenkov imaging method and apparatus can effectively improve the device space resolution and imaging signal to noise ratio, and are especially suitable for the imaging of plants or other living bodies having low imaging depth requirement.
Description
Technical field
The present invention relates to Digital Signal Processing, Photoelectric Signal Processing and nuclear detection field, the Cerenkov radiation detection method of more particularly, to a kind of Single Photon Time Resolved Spectrometer and device.
Background technology
Cerenkov radiation is a kind of visible region being sent by high speed charged corpuscle and neighbouring electromagnetic radiation.Existing Cerenkov detector, it is mainly the photodetector unit of high speed, extremely it is short of in terms of the positional information reading Cherenkov's event and energy information, such as the Cerenkov counter on Alpha magnetic spectrometer, its direction is captured by other particle detectors.If the event number that radiation event sends is less, or do not have other particles to be detected, the directional information of Cherenkov's event would become hard to be captured, significantly limit Cerenkov radiation in biology, medical science, national defence, industrial application and popularization.
Therefore, for the problems referred to above it is necessary to be directed to Cherenkov's photon and its radiating system, a kind of new Cerenkov radiation detection method and device are provided, to overcome drawbacks described above.Capture the angle of single Cerenkov radiation event comprehensively（2-D）, the time (1-D), position (3-D), energy (1-D) totally 7 dimension information.
Content of the invention
In view of this, it is an object of the invention to provide a kind of Cerenkov radiation detection method and device, the method and device can read the signal of telecommunication sample of multiple photons of Cherenkov's event effectively, met by the multi-photon time, reject self-luminous event, increase reconstructed image signal to noise ratio, it is to avoid the impact to read output signal for the baseline drift.
For achieving the above object, the present invention provides following technical scheme：
A kind of Cerenkov radiation detection method, it includes step：
S1：By laying photodetector array, read charged particle and send the photon counting of Cherenkov's photon directive detector module and the time of each counting；
S2：The time of carrying out time read is met；
S3：The position that Cherenkov's event occurs is estimated in the relative position of in the hole by photon.
Preferably, in above-mentioned Cerenkov radiation detection method, described Cherenkov's single event refers to that single radiosiotope atomic nucleus transmitting charged particle occurs Cerenkov effect in media as well.
Preferably, in above-mentioned Cerenkov radiation detection method, described monochromatic light subevent refers to that single visible ray that organism sent by self-luminous or Cherenkov's event or soft ultraviolet light photons hit the absorbed event of photoelectric device.
Preferably, in above-mentioned Cerenkov radiation detection method, the described time meets and refers to multiple single photons（No less than 20）Event is in a short period of time（Such as 20 ns）Occur, that is, think that this multiple monochromatic light subevent belongs to Cherenkov's single event.
Preferably, in above-mentioned Cerenkov radiation detection method, the photographic hole of described detector refers to the poroid geometry being built on detector base, and this some holes is used for determining the position that Cerenkov radiation occurs.
A kind of Cerenkov radiation detection device, meets module and Cherenkov's event estimation module including photodetector module, many examples time, wherein,
Photodetector module, for realizing the detection to Cherenkov's photon in the way of various visual angles.Detector module be designed with poroid detection geometry and single photon response time photoelectric device faster, in order to obtain the angle of Cherenkov's event（2-D）, the time (1-D), position (3-D), energy (1-D) totally 7 dimension information；
Many examples time meets module, and for judging whether multi-photon event belongs to Cherenkov's event, the standard of judgement is in shorter time window（Such as 20 ns）Inside there are multiple monochromatic light subevents（No less than 20）；
Cherenkov's event estimation module, for becoming the attribute of Cherenkov's event by the single photon meeting information reconstruction.
From technique scheme as can be seen that passing through the Cerenkov radiation detection method using the present invention and device, the imaging signal to noise ratio of device can be effectively improved, resisting biological tissue's self-luminous impact, being particularly suitable for the less demanding living imaging of the imaging depths such as plant.
Compared with prior art, the invention has the beneficial effects as follows：
（1）No lens design, the Cherenkov's number of photons receiving is many, and then can obtain higher signal noise ratio (snr) of image；
（2）The detector design of super-layer visual field, single pass can obtain Cherenkov's photon information at countless visual angles simultaneously；
（3）Resist bias light and the organism self luminous time meets design, advantageously reduce the background noise of imaging；
（4）Total event reads design and can comprehensively read the multidimensional information that Cherenkov's event is enriched：Angle（2-D）, the time (1-D), position (3-D), energy (1-D).It is specially the signal of telecommunication of record photoelectric device in the form of event.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing of required use in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing for the present invention in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the flow chart of the Cerenkov radiation detection method of Single Photon Time Resolved Spectrometer of the present invention；
Fig. 2 is the structure drawing of device of the Cerenkov radiation detection device of Single Photon Time Resolved Spectrometer of the present invention；
Fig. 3 is the position calculation schematic diagram of the Cerenkov radiation detection device of the present invention；
Fig. 4 is Cerenkov radiation generation mechanism schematic diagram of the present invention；
The typical photon intensity figure that Fig. 5 detects for Cerenkov detector of the present invention；
Fig. 6 composes for the position that Cerenkov detector of the present invention detects；
Fig. 7 is the reconstructed results of 30 Cherenkov's events of the present invention typical Cerenkov radiation detection device；
Fig. 8 is the reconstructed results of the test prosthese of section one of the present invention；
Fig. 9 is the reconstructed results of the test prosthese of section two of the present invention；
Figure 10 is the reconstructed results of the test prosthese of section three of the present invention.
Specific embodiment
The invention discloses a kind of Cerenkov radiation detection method of Single Photon Time Resolved Spectrometer and device, the method and device can be effectively realized the labelling of the event time of advent, the temporal resolution of hoisting module and device.
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 described in detail it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained on the premise of not making creative work, broadly fall into the scope of protection of the invention.
As shown in Figure 1, the Cerenkov radiation detection method of Single Photon Time Resolved Spectrometer disclosed by the invention and device pass through to gather single photon signal with the data mode of event, the recycling time meets the position screening out Cherenkov's event with estimation theory, and specific method and step is：
S1：By laying photodetector array, read charged particle and send the photon counting of Cherenkov's photon directive detector module and the time of each counting；
S2：The time of carrying out time read is met；
S3：The position that Cherenkov's event occurs is estimated in the relative position of in the hole by photon.
In the Cerenkov radiation detection device of above Single Photon Time Resolved Spectrometer, described Cherenkov's single event refers to that single radiosiotope atomic nucleus transmitting charged particle occurs Cerenkov effect in media as well..
In the Cerenkov radiation detection device of above Single Photon Time Resolved Spectrometer, described monochromatic light subevent refers to that single visible ray that organism sent by self-luminous or Cherenkov's event or soft ultraviolet light photons hit the absorbed event of photoelectric device.
In the Cerenkov radiation detection device of above Single Photon Time Resolved Spectrometer, the described time meets and refers to multiple single photons（No less than 20）Event is in a short period of time（Such as 20 ns）Occur, that is, think that this multiple monochromatic light subevent belongs to Cherenkov's single event.
In the Cerenkov radiation detection device of above Single Photon Time Resolved Spectrometer, the photographic hole of described detector refers to the poroid geometry being built on detector base, and this some holes is used for determining the position that Cerenkov radiation occurs.
As shown in Fig. 2 a kind of Cerenkov radiation detection device disclosed by the invention, meet module 200 and Cherenkov's event estimation module 300 including photodetector module 100, many examples time, wherein,
Photodetector module 100, for realizing the detection to Cherenkov's photon in the way of various visual angles.Detector module be designed with poroid detection geometry and single photon response time photoelectric device faster, in order to obtain the angle of Cherenkov's event（2-D）, the time (1-D), position (3-D), energy (1-D) totally 7 dimension information；
Many examples time meets module 200, and for judging whether multi-photon event belongs to Cherenkov's event, the standard of judgement is in shorter time window（Such as 20 ns）Inside there are multiple monochromatic light subevents（No less than 20）；
Cherenkov's event estimation module 300, for becoming the attribute of Cherenkov's event by the single photon meeting information reconstruction.
Fig. 1 is the flow chart of the Cerenkov radiation detection method of Single Photon Time Resolved Spectrometer of the present invention.Fig. 2 is the structure drawing of device of the Cerenkov radiation detection device of Single Photon Time Resolved Spectrometer of the present invention.Fig. 3 is the position calculation schematic diagram of the Cerenkov radiation detection device of the present invention.Fig. 4 is Cerenkov radiation generation mechanism schematic diagram of the present invention.The typical photon intensity figure that Fig. 5 detects for Cerenkov detector of the present invention.Fig. 6 composes for the position that Cerenkov detector of the present invention detects.Fig. 7 is the reconstructed results of 30 Cherenkov's events of the present invention typical Cerenkov radiation detection device.Fig. 8 is the reconstructed results of the test prosthese of section one of the present invention.Fig. 9 is the reconstructed results of the test prosthese of section two of the present invention.Figure 10 is the reconstructed results of the test prosthese of invention section three.In conjunction with Fig. 3, Fig. 4 and Fig. 5, by several specific embodiments, Cerenkov radiation detection method and the device of Single Photon Time Resolved Spectrometer of the present invention is described further.The Cerenkov radiation detection method of Single Photon Time Resolved Spectrometer proposed by the present invention and device, the parameter that it is related to, time meet process needs and are adjusted to reach good Cerenkov radiation resolution performance and shorter pulse duration according to the feature obtaining data.List the parameter of involved Application Example processing data herein.
Example 1：
List the parameter of the present embodiment processing data herein：
Step（1）Using the enhanced silicon photomultiplier of HONGGUANG, detector adopts circulus；
Step（2）Meeting the time is about 2ns, meets and judges to meet process using the time of off-line type；
Step（3）Using Cherenkov's event reconstruction method of parsing, directly draw time and the position of Cherenkov.
Example 2：
List the parameter of this application example 2 processing data herein：
Step（1）Using the enhanced photomultiplier tube of HONGGUANG, detector adopts slab construction；
Step（2）Meeting the time is about 10ns, meets and judges to meet process using the online time；
Step（3）Using Cherenkov's event reconstruction method of iteration, the approximant time drawing Cherenkov and position.
Methods and apparatus of the present invention can be used for radiating the nuclear technology of charged corpuscle, including nuclear detection, kernel analysis, Nuclear medical instruments.
In the Cerenkov radiation detection method that the present invention provides.Met by the time, reject self-luminous and the bias light of organism.The good imaging quality of Cherenkov's imaging method that time and the position of Cherenkov's event, single-view in background technology for the ratio or current charge read is judged in the relative position of in the hole by monochromatic light subevent, Cherenkov's photon of capture is many.
In Cerenkov radiation detection method disclosed by the invention, the isotope that injection can launch charged particle can be used for the biochemistry in labelling organism and physiological process；Read charged particle and send the photon counting of Cherenkov's photon directive detector module and the time of each counting；The time of carrying out time read is met；The position that Cherenkov's event occurs is estimated in the relative position of in the hole by photon；The position and time of the Cherenkov estimating is rebuild, obtains the distribution of nucleic.By comparing as can be seen that passing through the Cerenkov radiation detection method using the present invention and device, the imaging signal to noise ratio of device can be effectively improved, resisting biological tissue's self-luminous impact, being particularly suitable for the less demanding living imaging of the imaging depths such as plant.
Compared with prior art, the invention has the beneficial effects as follows：
（1）No lens design, the Cherenkov's number of photons receiving is many, and then can obtain higher signal noise ratio (snr) of image；
（2）The detector design of super-layer visual field, single pass can obtain Cherenkov's photon information at countless visual angles simultaneously；
（3）Resist bias light and the organism self luminous time meets design, advantageously reduce the background noise of imaging；
（4）Total event reads design and can comprehensively read the multidimensional information that Cherenkov's event is enriched：Angle（2-D）, the time (1-D), position (3-D), energy (1-D).It is specially the signal of telecommunication of record photoelectric device in the form of event.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing from the spirit or essential characteristics of the present invention, the present invention can be realized in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is limited by claims rather than described above, it is intended that all changes in the implication and scope of the equivalency of claim that fall are included in the present invention.Any reference in claim should not be considered as limiting involved claim.
In addition, it should be understood that, although this specification is been described by according to embodiment, but not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity, those skilled in the art should using description as an entirety, the technical scheme in each embodiment can also through appropriately combined, formed it will be appreciated by those skilled in the art that other embodiment.
Claims (5)
1. a kind of Cerenkov radiation detection method it is characterised in that：Including step：
S1：By laying photodetector array, read charged particle and send the photon counting of Cherenkov's photon directive detector module and the time of each counting；
S2：The time of carrying out time read is met；
S3：The position that Cherenkov's event occurs is estimated in the relative position of in the hole by photon.
2. a kind of Cerenkov radiation detection method according to claim 1 it is characterised in that：Cerenkov radiation detects the temporal information reading each photon using the method for photon counting, and the photoelectric device being adopted usually has the ability of photon example resolution, such as PMT, SiPM, APD etc..
3. Cerenkov radiation detection method according to claim 1 it is characterised in that：The positional information of described Cherenkov's event is rebuild by the relative position that in the hole reads.
4. Cerenkov radiation detection method according to claim 1 it is characterised in that：Depending on the judgement of described Cerenkov radiation event is met by the reading photon time in multiple holes, specifically have multiple in a short period of time（No less than 20）Single Cherenkov's photon of passage hits detector module.
5. a kind of Cerenkov radiation detection device it is characterised in that：Photodetector module, many examples time meet module and Cherenkov's event estimation module, wherein,
Photodetector module, for realizing the detection to Cherenkov's photon in the way of various visual angles；
Detector module be designed with poroid detection geometry and single photon response time photoelectric device faster, in order to obtain the angle of Cherenkov's event（2-D）, the time (1-D), position (3-D), energy (1-D) totally 7 dimension information；
Many examples time meets module, and for judging whether multi-photon event belongs to Cherenkov's event, the standard of judgement is in shorter time window（Such as 20 ns）Inside there are multiple monochromatic light subevents（No less than 20）；
Cherenkov's event estimation module, for becoming the attribute of Cherenkov's event by the single photon meeting information reconstruction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110465002A (en) * | 2019-07-09 | 2019-11-19 | 中国科学院西安光学精密机械研究所 | Tumor radiotherapy real-time monitoring synchronous acquisition device and monitoring instrument based on CLI |
| CN116966448A (en) * | 2023-09-22 | 2023-10-31 | 迈胜医疗设备有限公司 | FLASH treatment system, cerenkov detector, beam current measuring device and method thereof |
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