POINT SPREAD FUNCTION OF THE GENERAL CONE-BEAM X-RAY RECONSTRUCTION FORMULA

被引：13
|
作者：
WANG, G
LIN, TH
CHENG, PC
SHINOZAKI, DM
机构：
[1] SUNY BUFFALO,DEPT ELECT & COMP ENGN,ADV REAL TIME SYST LAB,BUFFALO,NY 14260
[2] UNIV WESTERN ONTARIO,FAC ENGN SCI,DEPT MAT ENGN,LONDON N6A 3K7,ONTARIO,CANADA
来源：
SCANNING | 1992年 / 14卷 / 04期
关键词：
D O I：
10.1002/sca.4950140402
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
In this paper, the spatially varying point spread function (PSF) of the general cone-beam x-ray reconstruction formula is derived. It is proved that the vertical integral of the PSF is a two-dimensional delta-function. Therefore, although the general cone-beam formula is not exact in nature, the vertical integral of the reconstructed three-dimensional image is equal to that of the actual image. The band-limited version of the PSF is also derived. The PSF of the general cone-beam formula is simulated, based on which the reconstruction resolution can be approximately inferred.
引用
收藏
页码：187 / 193
页数：7
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