MCP-PMT timing at low light intensities with a DRS4 evaluation board
Positron emission tomography (PET) is one of the most important diagnostic tools in medicine, allowing three-dimensional imaging of functional processes in the body. It is based on a detection of two gamma rays with an energy of 511 keV originating from the point of annihilation of the positron emit...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Centro de Gestión de la Información y Desarrollo de la Energía (CUBAENERGIA)
2019-08-01
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| Series: | Nucleus |
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| Online Access: | http://nucleus.cubaenergia.cu/index.php/nucleus/article/view/678 |
| _version_ | 1818481744523821056 |
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| author | D Consuegra S Korpar R Pestotnik P Križan R Dolenec |
| author_facet | D Consuegra S Korpar R Pestotnik P Križan R Dolenec |
| author_sort | D Consuegra |
| collection | DOAJ |
| description | Positron emission tomography (PET) is one of the most important diagnostic tools in medicine, allowing three-dimensional imaging of functional processes in the body. It is based on a detection of two gamma rays with an energy of 511 keV originating from the point of annihilation of the positron emitted by a radio-labeled agent. By measuring the difference of the arrival times of both annihilation photons it is possible to localize the tracer inside the body. Gamma rays are normally detected by a scintillation detector, whose timing accuracy is limited by a photomultiplier and a scintillator. By replacing a photo sensor with a microchannel plate PMT (MCP-PMT) and a scintillator with Cherenkov radiator, it is possible to localize the interaction position to the cm level. In a pioneering experimental study with Cherenkov detectors using PbF 2 crystals and microchannel plate photomultiplier tubes MCP-PMT a time resolution better than 100 ps was achieved. In this work a DRS4 digital ring sampler chip was used to read out single photon output signals from two different MCP-PMTs (Hamamatsu R3809 and Burle 85001) with a sampling rate of 5×109 samples/s. The digitized waveforms were analyzed and a comparison between the two detectors timing response was made. The time resolutions achieved were (161 ± 2.21) ps and (220 ± 2.63) ps FWHM for the Hamamatsu and Burle MCP-PMT respectively. No significant variances were observed in the study of the behavior of the FWHM when both MCP-PMT were scanned. |
| first_indexed | 2024-12-10T11:39:09Z |
| format | Article |
| id | doaj.art-25f49b049377472aa0f62cea9c9650fa |
| institution | Directory Open Access Journal |
| issn | 0864-084X 2075-5635 |
| language | English |
| last_indexed | 2024-12-10T11:39:09Z |
| publishDate | 2019-08-01 |
| publisher | Centro de Gestión de la Información y Desarrollo de la Energía (CUBAENERGIA) |
| record_format | Article |
| series | Nucleus |
| spelling | doaj.art-25f49b049377472aa0f62cea9c9650fa2022-12-22T01:50:19ZengCentro de Gestión de la Información y Desarrollo de la Energía (CUBAENERGIA)Nucleus0864-084X2075-56352019-08-010654246676MCP-PMT timing at low light intensities with a DRS4 evaluation boardD ConsuegraS KorparR PestotnikP KrižanR DolenecPositron emission tomography (PET) is one of the most important diagnostic tools in medicine, allowing three-dimensional imaging of functional processes in the body. It is based on a detection of two gamma rays with an energy of 511 keV originating from the point of annihilation of the positron emitted by a radio-labeled agent. By measuring the difference of the arrival times of both annihilation photons it is possible to localize the tracer inside the body. Gamma rays are normally detected by a scintillation detector, whose timing accuracy is limited by a photomultiplier and a scintillator. By replacing a photo sensor with a microchannel plate PMT (MCP-PMT) and a scintillator with Cherenkov radiator, it is possible to localize the interaction position to the cm level. In a pioneering experimental study with Cherenkov detectors using PbF 2 crystals and microchannel plate photomultiplier tubes MCP-PMT a time resolution better than 100 ps was achieved. In this work a DRS4 digital ring sampler chip was used to read out single photon output signals from two different MCP-PMTs (Hamamatsu R3809 and Burle 85001) with a sampling rate of 5×109 samples/s. The digitized waveforms were analyzed and a comparison between the two detectors timing response was made. The time resolutions achieved were (161 ± 2.21) ps and (220 ± 2.63) ps FWHM for the Hamamatsu and Burle MCP-PMT respectively. No significant variances were observed in the study of the behavior of the FWHM when both MCP-PMT were scanned.http://nucleus.cubaenergia.cu/index.php/nucleus/article/view/678tomografía computerizada con positróncontadores cherenkovmultiplicadores de electrones microcanalfotomultiplicadores |
| spellingShingle | D Consuegra S Korpar R Pestotnik P Križan R Dolenec MCP-PMT timing at low light intensities with a DRS4 evaluation board Nucleus tomografía computerizada con positrón contadores cherenkov multiplicadores de electrones microcanal fotomultiplicadores |
| title | MCP-PMT timing at low light intensities with a DRS4 evaluation board |
| title_full | MCP-PMT timing at low light intensities with a DRS4 evaluation board |
| title_fullStr | MCP-PMT timing at low light intensities with a DRS4 evaluation board |
| title_full_unstemmed | MCP-PMT timing at low light intensities with a DRS4 evaluation board |
| title_short | MCP-PMT timing at low light intensities with a DRS4 evaluation board |
| title_sort | mcp pmt timing at low light intensities with a drs4 evaluation board |
| topic | tomografía computerizada con positrón contadores cherenkov multiplicadores de electrones microcanal fotomultiplicadores |
| url | http://nucleus.cubaenergia.cu/index.php/nucleus/article/view/678 |
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