Sensitivity assessment of wide Axial Field of View PET systems via Monte Carlo simulations of NEMA-like measurements

Sensitivity assessment of wide Axial Field of View PET systems via Monte Carlo simulations of NEMA-like measurements
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DOI：
10.1016/j.nima.2007.05.145
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发表时间：
2007-09-21
期刊：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
影响因子：
1.4
通讯作者：
Fonte, P.
Fonte, P.
中科院分区：
物理与天体物理3区
文献类型：
--
作者：
Couceiro, M.;Ferreira, N. C.;Fonte, P.

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针对AFOV为200 cm量级的人体全身正电子发射断层扫描（PET）系统，采用蒙特卡洛模拟方法，结合近似解析模型，研究了宽轴向视场PET系统的灵敏度特性。模拟基于GEANT 4软件包，并严格遵循NEMA NU-2 1994规范。由立体角主导的灵敏度随着AFOV和轴向接受角而强烈增长，而散射分数几乎与几何形状无关。(C)2007 Elsevier B. V.保留所有权利。
The sensitivity characteristics of Positron Emission Tomography (PET) systems with wide Axial Field of View (AFOV) was studied by MonteCarlo simulations complemented by an approximate analytical model, aiming at full-body human PET systems with AFOV in the order of 200 cm. Simulations were based on the GEANT4 package and followed closely the NEMA NU-2 1994 norm. The sensitivity, dominated by the solid angle, grows strongly with the AFOV and with the axial acceptance angle, while the scatter fraction is almost independent from the geometry. (C) 2007 Elsevier B.V. All rights reserved.