In:
Journal of Computer Assisted Tomography, Ovid Technologies (Wolters Kluwer Health), Vol. 41, No. 5 ( 2017-9), p. 817-822
Abstract:
The aim of this study was to evaluate the impact of automated attenuation-based tube potential selection (ATPS) on image quality and radiation dose exposure parameters at a computed tomography angiography (CTA) lower-extremity runoff. Materials and Methods Two hundred forty patients (156 men, 84 women) underwent CTA examinations of the lower-extremity runoff on a second-generation dual-source computed tomography system: 120 patients at a fixed tube potential of 120 kV and a tube current of 180 reference mAs, another 120 patients using automated ATPS. Volume computed tomography dose index (CTDIvol), dose-length-product (DLP), body diameters, noise, signal-to-noise ratio, and subjective image quality were compared. Results In the ATPS group, 80 kV was automatically selected in 102 patients, 100 kV in 15 patients, and 120 kV in 3 patients; 140 kV was not chosen in any of the cases. The median CTDIvol of 4.81 mGy (2.2–10.6 mGy) and DLP of 568 mGy⋅cm (203–1324 mGy⋅cm) in the ATPS group were significantly lower compared with the CTDIvol of 8.1 mGy (4.4–14.4 mGy) and DLP of 1027.5 mGy⋅cm (509–1806 mGy⋅cm) in the fixed 120-kV group ( P 〈 0.01). Image quality was comparable ( P 〉 0.05). Conclusion Automated ATPS allows for significant dose savings in lower-extremity runoff CTA, whereas image quality remains constant at a high level.
Type of Medium:
Online Resource
ISSN:
1532-3145
,
0363-8715
DOI:
10.1097/RCT.0000000000000602
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2017
detail.hit.zdb_id:
80392-3
detail.hit.zdb_id:
2039772-0
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