Inverse fourier transform in the gamma coordinate system.
Inverse fourier transform in the gamma coordinate system.
复制标题
DOI:
10.1155/2011/285130
复制
发表时间:
2011
影响因子:
7.6
通讯作者:
Wang G
中科院分区:
文献类型:
--
作者:
Wei Y;Yu H;Wang G
This paper provides auxiliary results for our general scheme of computed tomography. In 3D parallel-beam geometry, we first demonstrate that the inverse Fourier transform in different coordinate systems leads to different reconstruction formulas and explain why the Radon formula cannot directly work with truncated projection data. Also, we introduce a gamma coordinate system, analyze its properties, compute the Jacobian of the coordinate transform, and define weight functions for the inverse Fourier transform assuming a simple scanning model. Then, we generate Orlov's theorem and a weighted Radon formula from the inverse Fourier transform in the new system. Furthermore, we present the motion equation of the frequency plane and the conditions for sharp points of the instantaneous rotation axis. Our analysis on the motion of the frequency plane is related to the Frenet-Serret theorem in the differential geometry.
登录
查看更多内容
影响因子:
1.1
作者:
Katsevich, A
通讯作者:
Katsevich, A
影响因子:
1.9
作者:
Katsevich, A
通讯作者:
Katsevich, A
影响因子:
2.1
作者:
Yu, HY;Ye, YB;Wang, G
通讯作者:
Wang, G
影响因子:
3.8
作者:
Ye, YB;Wang, G
通讯作者:
Wang, G
影响因子:
2.1
作者:
Palamodov, VP
通讯作者:
Palamodov, VP