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Proceedings Paper

A new CT architecture with stationary x-ray sources
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Paper Abstract

Current cardiac computed tomography (CT) is not fast enough for high or irregular heart rates, and the high radiation dose from cardiac CT scans remains a public concern. The primary cause of those unsatisfactory performances is the current CT architecture, in which one or two x-ray tubes need to be mechanically spun around an object to collect projection images, and x-ray beams need to be wide enough to cover the entire transaxial extent of an object without truncation. Here we present a new cardiac CT architecture. The new architecture features three distributed x-ray sources and three x-ray detectors. The three sources are stationary, with each containing an array of about 100 x-ray beams. The three detectors are rotating, and simultaneously acquire truncated projection data for the same interior region-of-interest. In synchrony with the rotating detectors, the three source arrays are electronically activated to simulate the spinning of three traditional single-beam x-ray sources. By estimate, the new architecture is expected to provide ≤50ms temporal resolution and ≤1mSv radiation dose.

Paper Details

Date Published: 17 October 2012
PDF: 11 pages
Proc. SPIE 8506, Developments in X-Ray Tomography VIII, 850613 (17 October 2012); doi: 10.1117/12.930571
Show Author Affiliations
Guohua Cao, Virginia Polytechnic Institute and State Univ. (United States)
Baodong Liu, Wake Forest Univ. (United States)
Hengyong Yu, Wake Forest Univ. (United States)
Ge Wang, Virginia Polytechnic Institute and State Univ. (United States)
Wake Forest Univ. (United States)

Published in SPIE Proceedings Vol. 8506:
Developments in X-Ray Tomography VIII
Stuart R. Stock, Editor(s)

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