Inverse-geometry CT with linearly distributed source and detector: stationary configuration and direct filtered-backprojection reconstruction

Tao Zhang; Yuxiang Xing; Hewei Gao; Zhiqiang Chen; Li Zhang

doi:10.1117/12.2534817

28 May 2019 Inverse-geometry CT with linearly distributed source and detector: stationary configuration and direct filtered-backprojection reconstruction

Tao Zhang, Yuxiang Xing, Hewei Gao, Zhiqiang Chen, Li Zhang

Author Affiliations +

Proceedings Volume 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine; 110722T (2019) https://doi.org/10.1117/12.2534817
Event: Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 2019, Philadelphia, United States

Abstract

Inverse-geometry computed tomography (CT) has potential in security inspection and medical applications. In this work, we explore a new concept of IGCT in stationary configuration with linearly distributed source and detector (L-IGCT). To develop an exact analytical reconstruction for L-IGCT, we derive a direct filteredbackprojection (FBP) type algorithm. We validate our method by simulation of a Shepp-Logan head phantom, in which CT images are exactly reconstructed from two L-IGCT scans, whose detector arrays are perpendicular to each other to provide sufficient projection data.

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Tao Zhang, Yuxiang Xing, Hewei Gao, Zhiqiang Chen, and Li Zhang "Inverse-geometry CT with linearly distributed source and detector: stationary configuration and direct filtered-backprojection reconstruction", Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 110722T (28 May 2019); https://doi.org/10.1117/12.2534817

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KEYWORDS

Sensors

Reconstruction algorithms

X-ray computed tomography

Detection and tracking algorithms

Detector arrays

Computed tomography

Linear filtering

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