Orthogonal-rotating tetrahedral scanning for cone-beam CT

Ivan B. Ye; Ge Wang

doi:10.1117/12.929179

17 October 2012 Orthogonal-rotating tetrahedral scanning for cone-beam CT

Ivan B. Ye, Ge Wang

Proceedings Volume 8506, Developments in X-Ray Tomography VIII; 850611 (2012) https://doi.org/10.1117/12.929179
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

In this article, a cone-beam CT scanning mode is designed assuming four x-ray sources and a spherical sample. The x-ray sources are mounted at the vertices of a regular tetrahedron. On the circumsphere of the tetrahedron, four detection panels are mounted opposite to each vertex. To avoid x-ray interference, the largest half angle of each x-ray cone beam is 27°22', while the radius of the largest ball fully covered by all the cone beams is 0.460, when the radius of the circumsphere is 1. Several scanning schemes are proposed which consist of two rotations about orthogonal axes, such that each quarter turn provides sufficient data for theoretically exact and stable reconstruction. This design can be used in biomedical or industrial settings, such as when a sequence of reconstructions of an object is desired. Similar scanning schemes based on other regular or irregular polyhedra and various rotation speeds are also discussed.

Citation Download Citation

Ivan B. Ye and Ge Wang "Orthogonal-rotating tetrahedral scanning for cone-beam CT", Proc. SPIE 8506, Developments in X-Ray Tomography VIII, 850611 (17 October 2012); https://doi.org/10.1117/12.929179

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