Background energy spectra for LSO/LYSO scintillation crystals of different geometries

Author:

Alva-Sánchez Héctor1ORCID

Affiliation:

1. Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, 01000 Mexico City, Mexico

Abstract

The background energy spectrum of lutetium oxyorthosilicate/lutetium yttrium oxyorthosilicate scintillation crystals used in positron emission imaging systems is a research topic of great interest owing to the possibility of using its structure to perform detector calibration and quality control without the need of using external radiation sources. In this paper, the background energy spectra for crystals of different sizes and geometries, including cuboids, frusta, cylinders, tetrahedra, and spheres, have been computed. This was done using a previously developed analytical model that requires the photon absorption probabilities for each shape, obtained through simulations using the PENELOPE Monte Carlo code. It has been found that crystals of different geometries, but with the same volume-to-surface area ratio, give rise to very similar background energy spectra, simplifying its computation. In addition, simple ray tracing simulations were performed, and a robust geometrical model was devised to investigate the geometrical grounds of this practical and compelling result.

Funder

Direcci�n General de Asuntos del Personal Acad�mico, Universidad Nacional Aut�noma de M�xico

Publisher

AIP Publishing

Subject

General Physics and Astronomy

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Determination of lutetium density in LYSO crystals: methodology and PET detector applications;Physics in Medicine & Biology;2024-03-26

2. Background energy spectra of lutetium-based inorganic scintillators for radiation detection;Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment;2023-11

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