Accurate modeling of nuclear-medicine collimators in Monte Carlo simulation of high-energy photons

Autor:	Kenneth F. Koral, S.J. Wilderman, Yuni K. Dewaraja
Rok vydání:	1999
Předmět:	Physics Nuclear and High Energy Physics Photon business.industry Scattering Astrophysics::High Energy Astrophysical Phenomena Monte Carlo method Collimator Electromagnetic radiation Spectral line law.invention law Nuclear medicine business Nucleon Penetration depth Instrumentation
Zdroj:	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 422:745-750
ISSN:	0168-9002
DOI:	10.1016/s0168-9002(98)01028-6
Popis:	Monte Carlo (MC) simulation of nuclear medicine imaging is more difficult for procedures employing 131I than for those using 99mTc because of the higher probability of collimator penetration for the higher-energy 131I gamma. Additionally, an accurate model of the imaging camera must also simulate the scattering and penetration of photons emitted above the 364 keV photo peak (637 keV (6.5%) and 723 keV (1.7%)). Most MC codes used in nuclear medicine either employ severe approximations of the collimator interactions or have not been extended to higher energies. The MC program SKEPTIC, which has previously been used to simulate slit aperture penetration of 511 keV gammas, has been modified to permit modeling of parallel hole collimators. We present here a comparison of measured and simulated energy spectra and point spread functions for 131I.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f6785721055f3cbdbc3486a763032dc3 https://doi.org/10.1016/s0168-9002(98)01028-6 Zobrazit plný text záznamu Full Text from ScienceDirect