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17 October 2022 Extension of the cone-beam CT field-of-view using two short scans with displaced centers of rotation
Gabriele Belotti, Simon Rit, Guido Baroni
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Proceedings Volume 12304, 7th International Conference on Image Formation in X-Ray Computed Tomography; 123040E (2022) https://doi.org/10.1117/12.2646384
Event: Seventh International Conference on Image Formation in X-Ray Computed Tomography (ICIFXCT 2022), 2022, Baltimore, United States
Abstract
A robotic cone-beam computed tomography (CT) scanner has inherent advantages. In particular, it enables source and detector trajectories capable of extending the field-of-view (FOV) of the reconstructed CT images, where the FOV is defined as the region in the source trajectory plane for which all ray lines are acquired (at any position and direction in this plane). Previous extensions of the FOV used an offset detector or a displaced center of rotation and a single full 360° scan. However, due to limitations in the conventional range of motion inside the treatment room to avoid collisions, some systems can only perform short scans. This paper investigates a new approach to FOV extension for an existing system by adapting the FOV extension to two complementary short scans with displaced centers of rotation. We validate this approach on numerical simulations of the Forbild thorax phantom.
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Gabriele Belotti, Simon Rit, and Guido Baroni "Extension of the cone-beam CT field-of-view using two short scans with displaced centers of rotation", Proc. SPIE 12304, 7th International Conference on Image Formation in X-Ray Computed Tomography, 123040E (17 October 2022); https://doi.org/10.1117/12.2646384
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KEYWORDS
Sensors
Scanners
Fluctuations and noise
Robotics
X-ray computed tomography
Computed tomography
Imaging systems
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