CT Coronary Angiography: 256-Slice and 320-Detector Row Scanners |
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Authors: | Edward M Hsiao Frank J Rybicki Michael Steigner |
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Institution: | (1) Applied Imaging Science Laboratory, Brigham and Women’s Hospital Radiology & Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA; |
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Abstract: | Multidetector computed tomography (MDCT) has rapidly evolved from 4-detector row systems in 1998 to 256-slice and 320-detector
row CT systems. With smaller detector element size and faster gantry rotation speed, spatial and temporal resolution of the
64-detector MDCT scanners have made coronary artery imaging a reliable clinical test. Wide-area coverage MDCT, such as the
256-slice and 320-detector row MDCT scanners, has enabled volumetric imaging of the entire heart free of stair-step artifacts
at a single time point within one cardiac cycle. It is hoped that these improvements will be realized with greater diagnostic
accuracy of CT coronary angiography. Such scanners hold promise in performing a rapid high quality “triple rule-out” test
without high contrast load, improved myocardial perfusion imaging, and even four-dimensional CT subtraction angiography. These
emerging technical advances and novel applications will continue to change the way we study coronary artery disease beyond
detecting luminal stenosis. |
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