UZH-Logo

Maintenance Infos

Radiation dose values for various coronary calcium scoring protocols in dual-source CT


Stolzmann, P; Leschka, S; Betschart, T; Desbiolles, L; Flohr, T G; Marincek, B; Alkadhi, H (2009). Radiation dose values for various coronary calcium scoring protocols in dual-source CT. International Journal of Cardiovascular Imaging, 25(4):443-451.

Abstract

Purpose The purpose of this study was to assess the radiation dose and associated image noise of previously suggested calcium scoring protocols using dual-source CT. Methods One hundred consecutive patients underwent coronary calcium scoring using dual-source CT. Patients were randomly assigned to five different protocols: retrospective ECG-gating and tube current reduction to 4% outside the pulsing window at 120 (protocol A) and 100 kV (B), prospective ECG-triggering at 120 (C) and 100 kV (D), and prospective ECG-triggering at 100 kV with attenuation-based tube current modulation (E). Radiation dose parameters and image noise were determined and compared. Results Protocol A resulted in an effective dose of 1.3 +/- 0.2 mSv, protocol B in 0.8 +/- 0.2 mSv, protocol C in 1.0 +/- 0.2 mSv, protocol D in 0.6 +/- 0.1 mSv, and protocol E in 0.7 +/- 0.1 mSv. Effective doses were significantly lower (P < 0.001) with 100 kV when compared to 120 kV protocols, and were significantly lower (P < 0.001) for prospective versus retrospective ECG-gating. No significant difference was found between protocol D and E. Significant negative correlations were found between the CTDI(vol) and heart rate for both retrospective ECG-gating protocols (protocol A: r = -0.98, P < 0.001; protocol B: r = -0.83, P < 0.001). The mean image noise was 29.0 +/- 6.7 HU, with no significant differences between the five protocols. The image noise was significantly correlated with the body weight (r = 0.21, P < 0.05) and BMI (r = 0.31, P < 0.01). Conclusions Effective dose of calcium scoring using dual-source CT ranges from 0.6 to 1.3 mSv. Prospective triggering and lower tube voltage significantly reduces the radiation but yield similar image noise.

Abstract

Purpose The purpose of this study was to assess the radiation dose and associated image noise of previously suggested calcium scoring protocols using dual-source CT. Methods One hundred consecutive patients underwent coronary calcium scoring using dual-source CT. Patients were randomly assigned to five different protocols: retrospective ECG-gating and tube current reduction to 4% outside the pulsing window at 120 (protocol A) and 100 kV (B), prospective ECG-triggering at 120 (C) and 100 kV (D), and prospective ECG-triggering at 100 kV with attenuation-based tube current modulation (E). Radiation dose parameters and image noise were determined and compared. Results Protocol A resulted in an effective dose of 1.3 +/- 0.2 mSv, protocol B in 0.8 +/- 0.2 mSv, protocol C in 1.0 +/- 0.2 mSv, protocol D in 0.6 +/- 0.1 mSv, and protocol E in 0.7 +/- 0.1 mSv. Effective doses were significantly lower (P < 0.001) with 100 kV when compared to 120 kV protocols, and were significantly lower (P < 0.001) for prospective versus retrospective ECG-gating. No significant difference was found between protocol D and E. Significant negative correlations were found between the CTDI(vol) and heart rate for both retrospective ECG-gating protocols (protocol A: r = -0.98, P < 0.001; protocol B: r = -0.83, P < 0.001). The mean image noise was 29.0 +/- 6.7 HU, with no significant differences between the five protocols. The image noise was significantly correlated with the body weight (r = 0.21, P < 0.05) and BMI (r = 0.31, P < 0.01). Conclusions Effective dose of calcium scoring using dual-source CT ranges from 0.6 to 1.3 mSv. Prospective triggering and lower tube voltage significantly reduces the radiation but yield similar image noise.

Citations

10 citations in Web of Science®
12 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

2 downloads since deposited on 14 Jan 2009
0 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Diagnostic and Interventional Radiology
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:April 2009
Deposited On:14 Jan 2009 17:01
Last Modified:13 Sep 2016 07:28
Publisher:Springer
ISSN:1569-5794
Additional Information:The original publication is available at www.springerlink.com
Publisher DOI:https://doi.org/10.1007/s10554-008-9397-y
PubMed ID:19082870

Download

[img]
Filetype: PDF - Registered users only
Size: 1MB
View at publisher

TrendTerms

TrendTerms displays relevant terms of the abstract of this publication and related documents on a map. The terms and their relations were extracted from ZORA using word statistics. Their timelines are taken from ZORA as well. The bubble size of a term is proportional to the number of documents where the term occurs. Red, orange, yellow and green colors are used for terms that occur in the current document; red indicates high interlinkedness of a term with other terms, orange, yellow and green decreasing interlinkedness. Blue is used for terms that have a relation with the terms in this document, but occur in other documents.
You can navigate and zoom the map. Mouse-hovering a term displays its timeline, clicking it yields the associated documents.

Author Collaborations