Evaluation of a new gridding method for fully 3D direct Fourier PET reconstruction based on a two-plane geometry

被引：1
作者：
Ben Bouallegue, F. [1 ]
Crouzet, J. F. [1 ]
Mariano-Goulart, D. [2 ]
机构：
[1] Montpellier Sci Univ, Dept Math, F-34095 Montpellier, France
[2] Montpellier Med Univ, Biophys & Nucl Med Dept, F-34295 Montpellier, France
来源：
COMPUTERIZED MEDICAL IMAGING AND GRAPHICS | 2008年 / 32卷 / 07期
关键词：
Direct Fourier methods; Gridding algorithms; Interpolation; PET; 3D reconstruction;
D O I：
10.1016/j.compmedimag.2008.06.006
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
This study investigated how the choice of fixed planes for the representation of the projection data of a cylindrical positron emission tomography (PET) scanner simplifies the frequency interpolation required by the 3D Fourier slice theorem (3D-FST). A new gridding algorithm based on a two-plane geometry and requiring only 1D interpolations in the Fourier domain was compared with the direct implementation of the 3D-FST. We show that the use of two orthogonal planes leads to signal to noise ratios similar to those achieved with the 3D-FST algorithm from projection data acquired with up to two times more count rates, while the resolution remains similar. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：580 / 589
页数：10
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