Coronary CT radiation dose reduction strategies at an Australian Tertiary Care Center – improvements in radiation exposure through an evidence‐based approach

Autor: Christian R. Hamilton‐Craig, Karman Tandon, Bianca Kwan, Karen DeBoni, Chris Burley, Allan J. Wesley, Rachael O’Rourke, Johanne Neill, Kelley R. Branch
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of Medical Radiation Sciences, Vol 67, Iss 1, Pp 25-33 (2020)
Druh dokumentu: article
ISSN: 2051-3909
2051-3895
DOI: 10.1002/jmrs.358
Popis: Abstract Introduction Coronary CT Angiography (CCTA) is a rapidly increasing technique for coronary imaging; however, it exposes patients to ionising radiation. We examined the impact of dose reduction techniques using ECG‐triggering, kVp/mAs reduction and high‐pitch modes on radiation exposure in a large Australian tertiary CCTA service. Methods Data on acquisition modes and dose exposure were prospectively collected on all CCTA scans from November 2009 to March 2014 at an Australian tertiary care centre. A dose reduction algorithm was developed using published techniques and implemented with education of medical staff, radiographers and referrers. Associations of CCTA acquisition to radiation over time were analysed with multivariate regression. Specificity in positive CCTA was assessed by correlation with invasive coronary angiography. Results 3333 CCTAs were analysed. Mean radiation dose decreased from 8.4 mSv to 5.3, 4.4, 3.7, 2.9 and 2.8 mSv (P
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