17 October 2012 A new CT architecture with stationary x-ray sources
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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.
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Guohua Cao, Baodong Liu, Hengyong Yu, Ge Wang, "A new CT architecture with stationary x-ray sources", Proc. SPIE 8506, Developments in X-Ray Tomography VIII, 850613 (17 October 2012); doi: 10.1117/12.930571; https://doi.org/10.1117/12.930571
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