NDLI: The Effect of Patient Diameter on the Dual-Energy Ratio of Selected Contrast-Producing Elements

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The Effect of Patient Diameter on the Dual-Energy Ratio of Selected Contrast-Producing Elements

Content Provider	Scilit
Author	Lambert, Jack W. Fitzgerald, Paul F. Edic, Peter M. Sun, Yuxin Bonitatibus Jr, Peter J. Colborn, Robert E. Yeh, Benjamin M.
Copyright Year	2017
Description	Journal: Journal of computer assisted tomography Objectives The aim of this study was to assess whether the low- to high-kVp computed tomography (CT) number ratio at dual-energy CT is affected by changes in patient diameter. Methods Seven contrast-producing elements were housed sequentially within an abdomen phantom. Fat rings enlarged the phantom diameter from 26 to 44 cm. The phantom was scanned using single-energy CT at tube potentials of 80 and 140 kVp and rapid-kVp-switching dual-energy CT. Results CT numbers decreased proportionally (∼20% CT number reduction for smallest to largest phantom diameters) for low- and high-energy acquisitions but resulted in consistent dual-energy ratios for each contrast element. For 17 of 21 material pair combinations, the dual-energy ratio ranges of the two elements did not overlap, implying that discrimination should remain possible for these material pairs at all patient sizes. Conclusions The dual-energy ratio for different contrast materials is largely unaffected by changes in phantom diameter. This should allow for robust separation of most contrast material combinations irrespective of patient size.
Related Links	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5420495/pdf
Ending Page	510
Page Count	6
Starting Page	505
ISSN	03638715
e-ISSN	15323145
DOI	10.1097/rct.0000000000000557
Journal	Journal of computer assisted tomography
Issue Number	3
Volume Number	41
Language	English
Publisher	Ovid Technologies (Wolters Kluwer Health)
Publisher Date	2017-01-01
Access Restriction	Open
Subject Keyword	Journal: Journal of computer assisted tomography Radiology, Nuclear Medicine and Imaging Contrast Media Dual-energy Ct Dual-energy Ratio High-z Elements
Content Type	Text
Resource Type	Article
Subject	Radiology, Nuclear Medicine and Imaging

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