Multigap RPC for PET: development and optimisation of the detector design

Georgiev, G.; Ilieva, Nevena; Kozhuharov, V.; Lessigiarska, I.; Litov, L.; Pavlov, B.; Petkov, P.

doi:10.1088/1748-0221/8/01/p01011

Cited by 12 publications

(25 citation statements)

References 20 publications

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“…The selections of these detectors are thus very crucial to the system resolution and performance. Other nonconventional detectors that have shown ToF's capabilities include gaseous detectors, such as resistive-plate chambers (RPC) [46], and concepts based on detection of prompt Cerenkov light are also being investigated [47].…”

Section: Choice Of Detectors For Tof-petmentioning

confidence: 99%

Instrumentation for Time-of-Flight Positron Emission Tomography

Ullah

Pratiwi

Cheon

et al. 2016

Nucl Med Mol Imaging

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Positron emission tomography (PET) is a molecular imaging modality that provides information at the molecular level. This system is composed of radiation detectors to detect incoming coincident annihilation gamma photons emitted from the radiopharmaceutical injected into a patient's body and uses these data to reconstruct images. A major trend in PET instrumentation is the development of time-of-flight positron emission tomography (ToF-PET). In ToF-PET, the time information (the instant the radiation is detected) is incorporated for image reconstruction. Therefore, precise and accurate timing recording is crucial in ToF-PET. ToF-PET leads to better localization of the annihilation event and thus results in overall improvement in the signal-to-noise ratio (SNR) of the reconstructed image. Several factors affect the timing performance of ToF-PET. In this article, the background, early research and recent advances in ToF-PET instrumentation are presented. Emphasis is placed on the various types of scintillators, photodetectors and electronic circuitry for use in ToF-PET, and their impact on timing resolution is discussed.

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Section: Choice Of Detectors For Tof-petmentioning

confidence: 99%

Instrumentation for Time-of-Flight Positron Emission Tomography

Ullah

Pratiwi

Cheon

et al. 2016

Nucl Med Mol Imaging

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“…The dependence of efficiency on the converter thickness was discussed in Ref. [8]. Efficiency increases with converter thickness until a maximum value is reached, and after which it will start to decrease.…”

Section: Thicknessmentioning

confidence: 99%

“…As the number of total gas gaps increase, to maximize the detection efficiency the convertor has to be thinner. A RPC can be simplified as a converter-gap-stacks model, thus the number of electrons emerging in n gaps reads [8]:…”

Section: Thicknessmentioning

confidence: 99%

Monte Carlo simulation study of RPC-based 0.511 MeV photon detector with GEANT4

Zhou

Shao

et al. 2014

J. Inst.

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The Resistive Plate Chambers (RPC) are low-cost charged-particle detectors with good timing resolution and potentially good spatial resolution. Using RPC as gamma detector provides an opportunity for application in positron emission tomography (PET). In this work, we use GEANT4 simulation package to study various methods improving the detection efficiency of a realistic RPC-based PET model for 511keV photons, by adding more detection units, changing the thickness of each layer, choosing different converters and using multi-gaps RPC (MRPC) technique. Proper balance among these factors are discussed. It's found that although RPC with materials of high atomic number can reach a higher efficiency, they may contribute to a poor spatial resolution and higher background level.

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“…The interaction cross-section is proportional to the atomic number of the material and inversely proportional to the energy of the photons. The electrons escaped from the converter have lower range in comparison to incident X-ray and subsequently it can ionize the gas detector with higher efficiency [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Testing CuO nanowires as a novel X-ray to electron converter for gas-filled radiation detectors

2017

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A: Nanowires, due to their special physical properties and also high surface to volume ratio, can have considerable applications in designing and development of novel nanodevices. For the radiation shielding, higher absorption coefficient of nanostructures in comparison to bulk ones is an advantage. In gas detectors, designing a proper converter that absorbs higher energy of gamma and X-rays and convert it to more free electrons is one of the major problems. Since the nanowires have higher surface to volume ratio in comparison to the bulk one, so it is expected that by optimizing the thickness, the generated electrons can have higher chance to escape from the surface. In this work, the random CuO nanowires with diameter of 40 nm are deposited on thin glass slide. This nanostructure with different thicknesses are tested by plastic and CsI scintillators by X-ray tube with HVs in the range of 16 to 25 kV. The results show that for the same thickness, the CuO nanowires can release electrons six times more than the bulk ones and for the same energy the optimum QE of nanoconverter can be three times greater than the bulk converter. This novel nanoconverter with higher detection efficiency can have applications in high energy physics, medical imaging and also astronomy. K: Interaction of radiation with matter; Materials for gaseous detectors; X-ray detectors; Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc) 1Corresponding author.

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Multigap RPC for PET: development and optimisation of the detector design

Cited by 12 publications

References 20 publications

Instrumentation for Time-of-Flight Positron Emission Tomography

Instrumentation for Time-of-Flight Positron Emission Tomography

Monte Carlo simulation study of RPC-based 0.511 MeV photon detector with GEANT4

Testing CuO nanowires as a novel X-ray to electron converter for gas-filled radiation detectors

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