We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Automated tube voltage selection for radiation dose and contrast medium reduction at coronary CT angiography using 3(rd) generation dual-source CT.
- Authors
Mangold, Stefanie; Wichmann, Julian; Schoepf, U.; Poole, Zachary; Canstein, Christian; Varga-Szemes, Akos; Caruso, Damiano; Bamberg, Fabian; Nikolaou, Konstantin; Cecco, Carlo; Wichmann, Julian L; Schoepf, U Joseph; Poole, Zachary B; De Cecco, Carlo N
- Abstract
<bold>Objectives: </bold>To investigate the relationship between automated tube voltage selection (ATVS) and body mass index (BMI) and its effect on image quality and radiation dose of coronary CT angiography (CCTA).<bold>Methods: </bold>We evaluated 272 patients who underwent CCTA with 3(rd) generation dual-source CT (DSCT). Prospectively ECG-triggered spiral acquisition was performed with automated tube current selection and advanced iterative reconstruction. Tube voltages were selected by ATVS (70-120 kV). BMI, effective dose (ED), and vascular attenuation in the coronary arteries were recorded. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated. Five-point scales were used for subjective image quality analysis.<bold>Results: </bold>Image quality was rated good to excellent in 98.9 % of examinations without significant differences for proximal and distal attenuation (all p ≥ .0516), whereas image noise was rated significantly higher at 70 kV compared to ≥100 kV (all p < .0266). However, no significant differences were observed in SNR or CNR at 70-120 kV (all p ≥ .0829). Mean ED at 70-120 kV was 1.5 ± 1.2 mSv, 2.4 ± 1.5 mSv, 3.6 ± 2.7 mSv, 5.9 ± 4.0 mSv, 7.9 ± 4.2 mSv, and 10.7 ± 4.1 mSv, respectively (all p ≤ .0414). Correlation analysis showed a moderate association between tube voltage and BMI (r = .639).<bold>Conclusion: </bold>ATVS allows individual tube voltage adaptation for CCTA performed with 3(rd) generation DSCT, resulting in significantly decreased radiation exposure while maintaining image quality.<bold>Key Points: </bold>• Automated tube voltage selection allows an individual tube voltage adaption in CCTA. • A tube voltage-based reduction of contrast medium volume is feasible. • Image quality was maintained while radiation exposure was significantly decreased. • A moderate association between tube voltage and body mass index was found.
- Subjects
CORONARY angiography; COMPUTED tomography; RADIATION doses; CONTRAST media; ELECTRIC potential; BODY mass index
- Publication
European Radiology, 2016, Vol 26, Issue 10, p3608
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-015-4191-4