C-arm based cone-beam CT using a two-concentric-arc source trajectory: system evaluation

Joseph Zambelli; Tingliang Zhuang; Brian E. Nett; Cyril Riddell; Barry Belanger; Guang-Hong Chen

doi:10.1117/12.772781

19 March 2008 C-arm based cone-beam CT using a two-concentric-arc source trajectory: system evaluation

Joseph Zambelli, Tingliang Zhuang, Brian E. Nett, Cyril Riddell, Barry Belanger, Guang-Hong Chen

Proceedings Volume 6913, Medical Imaging 2008: Physics of Medical Imaging; 69134U (2008) https://doi.org/10.1117/12.772781
Event: Medical Imaging, 2008, San Diego, California, United States

Abstract

The current x-ray source trajectory for C-arm based cone-beam CT is a single arc. Reconstruction from data acquired with this trajectory yields cone-beam artifacts for regions other than the central slice. In this work we present the preliminary evaluation of reconstruction from a source trajectory of two concentric arcs using a flat-panel detector equipped C-arm gantry (GE Healthcare Innova 4100 system, Waukesha, Wisconsin). The reconstruction method employed is a summation of FDK-type reconstructions from the two individual arcs. For the angle between arcs studied here, 30°, this method offers a significant reduction in the visibility of cone-beam artifacts, with the additional advantages of simplicity and ease of implementation due to the fact that it is a direct extension of the reconstruction method currently implemented on commercial systems. Reconstructed images from data acquired from the two arc trajectory are compared to those reconstructed from a single arc trajectory and evaluated in terms of spatial resolution, low contrast resolution, noise, and artifact level.

Citation Download Citation

Joseph Zambelli, Tingliang Zhuang, Brian E. Nett, Cyril Riddell, Barry Belanger, and Guang-Hong Chen "C-arm based cone-beam CT using a two-concentric-arc source trajectory: system evaluation", Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69134U (19 March 2008); https://doi.org/10.1117/12.772781

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