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• W2084745369 abstract "Background The 256-multislice CT (256MSCT) obtains volumetric data with 128-mm coverage in a single rotation. This coverage allows satisfactory visualization of the whole heart, allowing the 256MSCT to visualize the cardiac chambers and coronary arteries by cine scan without ECG gating. These characteristics provide a solution to the problems of MSCT. Although a wider beam width provides more efficient imaging over a wider coverage area, patient doses with the 256MSCT are of considerable concern. Objective We assessed potential radiation exposure with the 256MSCT in a cardiac CT protocol and compared the results to those with 16- and 64MSCT (collimated 64 × 0.5 mm using 256MSCT). Methods Organ or tissue doses were measured in an anthropomorphic phantom under a coronary artery imaging protocol with the 256MSCT in cine scan mode without ECG gating, and with the 16- and 64MSCT in helical scan mode with ECG gating. Results Average effective doses were 22.8 mSv for the 16MSCT, 27.8 mSv for the 64MSCT and 14.1 mSv for the 256MSCT. The 16- and 64MSCT doses were thus approximately 1.6- and 2.0-fold higher than those of the 256MSCT. Conclusions Use of the 256MSCT in cardiac volumetric cine imaging offers lower radiation exposure than 16- and 64MSCT, and suggests the potential of this equipment in single-beat cardiac imaging without ECG gating. This effective dose is acceptable for routine cardiac imaging." @default.
• W2084745369 created "2016-06-24" @default.
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• W2084745369 date "2008-03-01" @default.
• W2084745369 modified "2023-10-14" @default.
• W2084745369 title "Effective doses in subjects undergoing computed tomography cardiac imaging with the 256-multislice CT scanner" @default.
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• W2084745369 doi "https://doi.org/10.1016/j.ejrad.2007.05.001" @default.
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