Low-dose CT Cardiac Imaging
Jiang Hsieh
John Londt
Melissa Vass
Xiangyang Tang
Jay Li
Darin Okerlund
Abstract：Cardiac imaging with computed tomography (CT) is one of the most recent advancements in CT clinical applications. Because of the low helical pitch employed in the cardiac acquisition protocols, radiation dose to patient is high. In this paper, we present a different data acquisition and image reconstruction technique that reduces dose to patient by 50%～89%. The key enabler for such technique is the large volume coverage (40㎜) of the 64-slice scanner. Compared to an average heart size of 120㎜ to 140㎜ the new VCT scanner is capable of covering the entire organ in 3 to 4 steps. In conjunction with the new acquisition, we present a complimentary reconstruction algorithm that overcomes incomplete projection samples. We conducted extensive phantom and clinical experiments to demonstrate the efficacy of the proposed approach.
Keywords：CTcardiac imagingstep-and-shoot acquisitioncone beam reconstruction
Publication Date：2007-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 52-59,65 )