Share Email Print
cover

Proceedings Paper

Implementation and evaluation of the half-scan scheme based on CBCT (cone-beam CT) system
Author(s): Dong Yang; Ruola Ning; Yong Yu; David Conover; Xianghua Lu
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A modified Feldkamp (FDK) 3-D cone beam algorithm was developed to conduct the half-scan scheme on a flat panel detector (FPD)-based prototype CBCT system which is available in our Lab. X-ray source scans the object in a circular trajectory in the range of 180 degrees plus full cone 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 adopted to get the reconstruction image. The breast phantom and breast specimen are used in the experiment and the objects reconstructed from half-scan CBCT are compared with those reconstructed from full scan. The applicability of the half-scan scheme is testified in terms of image noise level, contrast resolution. The half-scan scheme is expected to improve the temporal resolution and may also reduce the patients’ X-ray dose level. The result showed an encouraging potential usage of the Half-scan CBCT in the functional 4-D CT imaging.

Paper Details

Date Published: 6 May 2004
PDF: 10 pages
Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); doi: 10.1117/12.536008
Show Author Affiliations
Dong Yang, Univ. of Rochester (United States)
Ruola Ning, Univ. of Rochester Medical Ctr. (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. 5368:
Medical Imaging 2004: Physics of Medical Imaging
Martin J. Yaffe; Michael J. Flynn, Editor(s)

© SPIE. Terms of Use
Back to Top