Iterative reconstruction for helical CT: a simulation study

被引：235

作者：

Nuyts, J ^{[1
]}

De Man, B

Dupont, P

Defrise, M

Suetens, P

Mortelmans, L

机构：

[1] Katholieke Univ Leuven, Dept Nucl Med, B-3001 Leuven, Belgium

[2] Katholieke Univ Leuven, ESAT MI2, B-3001 Leuven, Belgium

[3] Free Univ Brussels, Brussels, Belgium

来源：

PHYSICS IN MEDICINE AND BIOLOGY | 1998年 / 43卷 / 04期

关键词：

D O I：

10.1088/0031-9155/43/4/003

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Iterative reconstruction algorithms for helical CT are presented. The algorithms are derived from two-dimensional reconstruction algorithms, by adapting the projector/backprojector to the helical orbit of the source, and by constraining the axial frequencies with a Gaussian sieve. Simulations have been carried out and the performance of the iterative algorithms is compared to that of filtered backprojection of synthetic (interpolated) two-dimensional sinograms. The iterative algorithms produce superior bias-noise curves. Axial resolution is superior, but disturbing edge-artefacts are introduced.

引用

页码：729 / 737

页数：9

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