Sergey Kriminski et al 2005 Phys. Med. Biol. 50 5263 doi:10.1088/0031-9155/50/22/004
Sergey Kriminski1, Matthias Mitschke2, Stephen Sorensen1, Nicole M Wink1, Phillip E Chow1, Steven Tenn1 and Timothy D Solberg1,3,4
Show affiliationsA methodology for 3D image reconstruction from retrospectively gated cone-beam CT projection data has been developed. A mobile x-ray cone-beam device consisting of an isocentric C-arm equipped with a flat panel detector was used to image a moving phantom. Frames for reconstruction were retrospectively selected from complete datasets based on the known rotation of the C-arm and a signal from a respiratory monitor. Different sizes of gating windows were tested. A numerical criterion for blur on the reconstructed image was suggested. The criterion is based on minimization of an Ising energy function, similar to approaches used in image segmentation or restoration. It is shown that this criterion can be used for the determination of the optimal gating window size. Images reconstructed from the retrospectively gated projection sequences using the optimal gating window data showed a significant improvement compared to images reconstructed from the complete projection datasets.
Issue 22 (21 November 2005)
Received 30 June 2005, in final form 16 September 2005
Published 24 October 2005
Sergey Kriminski et al 2005 Phys. Med. Biol. 50 5263
Yazhou Wang et al 2009 Supercond. Sci. Technol. 22 125015
J F R Archilla et al 2001 J. Phys. A: Math. Gen. 34 6363
A Gaur et al 2009 J. Phys.: Conf. Ser. 190 012084
D. C. Homan and J. F. C. Wardle 2000 ApJ 535 575
Carlos N Kozameh and Florencia Parisi 2004 Class. Quantum Grav. 21 2617
T Comaschi et al 2009 J. Phys.: Conf. Ser. 190 012122
Vinay Jaiswal and M Joy Thomas 2003 J. Phys. D: Appl. Phys. 36 3089
C. Batalha et al. 2002 ApJ 580 343
A J E Raaijmakers et al 2007 Phys. Med. Biol. 52 7045