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Tilted plane Feldkamp type reconstruction algorithm for spiral cone beam CT
Author(s) -
Yan Ming,
Zhang Cishen
Publication year - 2005
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2098154
Subject(s) - iterative reconstruction , reconstruction algorithm , spiral (railway) , algorithm , image quality , projection (relational algebra) , plane (geometry) , cone beam computed tomography , computer vision , data set , mathematics , tomography , artificial intelligence , computer science , image (mathematics) , optics , geometry , physics , computed tomography , mathematical analysis , medicine , radiology
An approximate image reconstruction method for spiral cone beam computed tomography (CT), called tilted plane Feldkamp type reconstruction algorithm (TPFR), is presented in this paper, which extends Feldkamp cone beam reconstruction algorithm to deal with its inaccuracy and artifact problems caused by large cone angle. This is done by tilting the reconstructing planes to minimize the cone angle and optimally fit the spiral segment of the source. The tilted plane image reconstruction requires reforming the three‐dimensional projection data set for the tilted plane and application of Feldkamp algorithm to the reformed data set. Analytical and computational results can show that the image reconstruction performance of the proposed TPFR algorithm is superior to that of the Feldkamp reconstruction algorithm in the image quality, volume coverage speed, maximum achievable pitch value, and slice sensitivity profiles. Moreover, it provides more accurate image reconstruction than the existing two‐dimensional reconstruction algorithms.