Attenuation-based automatic kilovolt (kV)-selection in computedtomography of the chest: Effects on radiation exposure and imagequality

Eller A, Wüst W, Scharf M, Brand M, Achenbach S, Uder M, Lell M (2013)

Publication Type: Journal article

Publication year: 2013

Journal

European Journal of Radiology Elsevier

Book Volume: 82

Pages Range: 2386-2391

Journal Issue: 12

DOI: 10.1016/j.ejrad.2013.08.043

Abstract

Objectives: To evaluate an automated attenuation-based kV-selection in computed tomography of thechest in respect to radiation dose and image quality, compared to a standard 120 kV protocol.Materials and methods: 104 patients were examined using a 128-slice scanner. Fifty examinations (58 ± 15years, study group) were performed using the automated adaption of tube potential (100-140 kV), basedon the attenuation profile of the scout scan, 54 examinations (62 ± 14 years, control group) with fixed120 kV. Estimated CT dose index (CTDI) of the software-proposed setting was compared with a 120 kVprotocol. After the scan CTDI volume (CTDIvol) and dose length product (DLP) were recorded. Imagequality was assessed by region of interest (ROI) measurements, subjective image quality by two observerswith a 4-point scale (3 - excellent, 0 - not diagnostic).Results: The algorithm selected 100 kV in 78% and 120 kV in 22%. Overall CTDIvol reduction was 26.6%(34% in 100 kV) overall DLP reduction was 22.8% (32.1% in 100 kV) (all p < 0.001). Subjective image qualitywas excellent in both groups.Conclusion: The attenuation based kV-selection algorithm enables relevant dose reduction (?27%) inchest-CT while keeping image quality parameters at high levels. © 2013 Elsevier Ireland Ltd. All rights reserved.

Authors with CRIS profile

Wolfgang Wüst Medizinische Fakultät Michael Brand Medizinische Fakultät Stephan Achenbach Lehrstuhl für Innere Medizin II Michael Uder Lehrstuhl für Diagnostische Radiologie Michael Lell Medizinische Fakultät

How to cite

APA:

Eller, A., Wüst, W., Scharf, M., Brand, M., Achenbach, S., Uder, M., & Lell, M. (2013). Attenuation-based automatic kilovolt (kV)-selection in computedtomography of the chest: Effects on radiation exposure and imagequality. European Journal of Radiology, 82(12), 2386-2391. https://doi.org/10.1016/j.ejrad.2013.08.043

MLA:

Eller, Achim, et al. "Attenuation-based automatic kilovolt (kV)-selection in computedtomography of the chest: Effects on radiation exposure and imagequality." European Journal of Radiology 82.12 (2013): 2386-2391.

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