Jongduk Baek,Norbert J. Pelc Stanford Univ. (United States) Bruno Deman,Jorge Uribe,Daniel Harrison,Joseph Reynolds,Bogdan Neculaes,Louis Inzinna,Antonio Caiafa GE Global Research Ctr. (United States)
The multi-source inverse-geometry CT(MS-IGCT) system is composed of multiple sources and a small 2D detector
array. An experimental MS-IGCT system was built and we report initial results with 2×4 x-ray sources, a 75 mm inplane
field-of-view (FOV) and 160 mm z-coverage in a single gantry rotation. To evaluate the system performance,
experimental data were acquired from several phantoms and a post-mortem rat. Before image reconstruction, geometric
calibration, data normalization, beam hardening correction and detector spectral calibration were performed. For
reconstruction, the projection data were rebinned into two full cone beam data sets, and the FDK algorithm was used.
The reconstructed volumes from the upper and lower source rows shared an overlap volume which was combined in
image space. The reconstructed images of the uniform cylinder phantom showed good uniformity of the reconstructed
values without any artifacts. The rat data were also reconstructed reliably. The initial experimental results from this
rotating-gantry MS-IGCT system demonstrated its ability to image a complex anatomical object without any significant
image artifacts and to ultimately achieve large volumetric coverage in a single gantry rotation.
Jongduk Baek,
Norbert J. Pelc,
Bruno Deman,
Jorge Uribe,
Daniel Harrison,
Joseph Reynolds,
Bogdan Neculaes,
Louis Inzinna,
Antonio Caiafa,
"Initial results with a multisource inverse-geometry CT system", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83131A (3 March 2012); doi: 10.1117/12.912207; https://doi.org/10.1117/12.912207
Jongduk Baek, Norbert J. Pelc, Bruno Deman, Jorge Uribe, Daniel Harrison, Joseph Reynolds, Bogdan Neculaes, Louis Inzinna, Antonio Caiafa, "Initial results with a multisource inverse-geometry CT system," Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83131A (3 March 2012);