Assessment of reflective separator films for small crystal arrays

Pépin, C.; Bérard, P.

doi:10.1109/nssmic.2001.1009696

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…The reflection coefficient of METAL reflector (ESR) of 98.5% at the peak wavelength was provided by the manufacturer, which is also consistent with results previously reported (Pepin et al 2001, Motta andSchönert 2005). However, the reflection coefficient of PAINT (Teflon) varies from 92% to 99% among different publications (Weidner and Hsia 1981, Cherry et al 1995, Labsphere 1998, Pepin et al 2001, Saoudi et al 2000, Waldwick et al 2007.…”

Section: Monte Carlo Simulationsupporting

confidence: 87%

Study of light transport inside scintillation crystals for PET detectors

et al. 2013

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Scintillation crystal design is a critical component in positron emission tomography system development, which impacts a number of performance parameters including energy resolution, time resolution and spatial resolution. Our work aims to develop a generalized simulation tool to model the light transport inside scintillation crystals with good accuracy, taking into account surface treatments, reflectors, temporal dependence of scintillation decay, and comprehensive experimental validations. The simulation has been validated against both direct analytical calculation and experimental measurements. In this work, the studies were performed for a lutetium-yttrium oxyorthosilicate crystal of 3×3×20 mm(3) dimension coupled to a Hamamatsu silicon photomultiplier, with respect to light output, rise-time slope, energy resolution and time resolution. Four crystal surface treatment and reflector configurations were investigated: GroundMetal, GroundPaint, PolishMetal and PolishPaint. The experiments were performed to validate the Monte Carlo simulation results. The results indicate that the best time resolution (0.96±0.05 ns) and good energy resolution (10.6±0.4%) could be produced by using a polished surface with specular reflector, while the configuration of a polished surface with diffusive reflector produces the best energy resolution (10.2±0.9%). The results indicate that a polished surface with diffusive reflector achieves the best energy resolution (10.2±0.9%) for 511 keV high energy photons, and a polished surface with specular reflector achieves the best time resolution (0.96±0.05 ns) measured against a Hamamatsu fast photomultiplier tube. The ground surface treatment is not recommended for its inferior performance in terms of energy and time resolution. Possible explanations and future improvements to be made to the developed simulation tool are discussed.

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Section: Monte Carlo Simulationsupporting

confidence: 87%

Study of light transport inside scintillation crystals for PET detectors

et al. 2013

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“…The technologies that enabled <1 mm cross-section PET detectors were: (1) high light output, high density scintillator materials (e.g. LSO and LYSO); (2) very thin, highly reflective reflector materials such as 3 M mirror film (Weber et al 2000 and Lumirror polyester films (Pepin et al 2001;and (3) high density, small cross-section photosensor devices. These photosensors include: multi-anode photomultiplier tubes (PMTs) (Shao et al 1997b, 2000a, Pani et al 2003, position-sensitive PMTs (Nagai et al 1999, Shao et al 2000a, Miyaoka et al 2001, avalanche photodiodes (APDs) , Pichler et al 2001, Mcelroy et al 2005, position sensitive APDs (Nagarkar et al 2004, Yang et al 2006, James et al 2009 and silicon photomultiplier (SiPM) arrays (Song et al 2010, Yamaya et al 2011, Yamamoto et al 2016, Kuang et al 2019.…”

Section: Discrete Crystalsmentioning

confidence: 99%

Small animal PET: a review of what we have done and where we are going

Miyaoka

Lehnert

2020

Phys. Med. Biol.

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Small animal research is an essential tool in studying both pharmaceutical biodistribution and disease progression over time. Furthermore, through the rapid development of in vivo imaging technology over the last few decades, small animal imaging (also referred to as preclinical imaging) has become a mainstay for all fields of biologic research and a center point for most preclinical cancer research. Preclinical imaging modalities include optical, MRI and MRS, microCT, small animal PET, ultrasound, and photoacoustic, each with their individual strengths. The strong points of small animal PET are its translatability to the clinic; its quantitative imaging capabilities; its whole-body imaging ability to dynamically trace functional/biochemical processes; its ability to provide useful images with only nano- to pico- molar concentrations of administered compounds; and its ability to study animals serially over time. This review paper gives an overview of the development and evolution of small animal PET imaging. It provides an overview of detector designs; system configurations; multimodality PET imaging systems; image reconstruction and analysis tools; and an overview of research and commercially available small animal PET systems. It concludes with a look toward developing technologies/methodologies that will further enhance the impact of small animal PET imaging on medical research in the future.

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“…Each scintillator has size of 1.9 Â 1.9 Â 30 mm 3 , with saw-cut surface finish and optically separated from other scintillators on all sides except two ends by ESR reflectors [3M (Ref. 13)]. The overall size of the array is $16 Â 16 Â 30 mm 3 .…”

Section: Iia Experiments Setup and Measurementmentioning

confidence: 99%