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Proceedings Paper

Modified FDK half-scan (MFDKHS) scheme on flat panel detector-based cone-beam CT
Author(s): Dong Yang; Ruola Ning; Yong Yu; David Conover; Xianghua Lu
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Paper Abstract

A modified Feldkamp (FDK) half-scan (MFDKHS) algorithm was developed to conduct the circular half-scan scheme on a flat panel detector (FPD)-based CBCT. X-ray source scans the object in a circular trajectory in the range of 180 degrees plus full fan angle rather than 360 degrees for a full scan. The redundant data is weighted by a weighting function in 3-D case based on the ones proposed by Parker1, FDK algorithm is then applied on this weighted data, and another FBP term developed by Dr. Hu is also added to get the final reconstruction. The MFDKHS is expected to correct the attenuation coefficient drop of the reconstructed object associated with FDK in the place where Z (rotation axis) is away from scanning plane and improve the temporal resolution as well.

Paper Details

Date Published: 20 April 2005
PDF: 8 pages
Proc. SPIE 5745, Medical Imaging 2005: Physics of Medical Imaging, (20 April 2005); doi: 10.1117/12.595172
Show Author Affiliations
Dong Yang, Univ. of Rochester (United States)
Ruola Ning, Univ. of Rochester (United States)
Yong Yu, Univ. of Rochester Medical Ctr. (United States)
David Conover, Univ. of Rochester Medical Ctr. (United States)
Xianghua Lu, Univ. of Rochester Medical Ctr. (United States)

Published in SPIE Proceedings Vol. 5745:
Medical Imaging 2005: Physics of Medical Imaging
Michael J. Flynn, Editor(s)

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