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Coronary risk assessment at X-ray dose equivalent ungated chest CT: Results of a multi-reader study

Michael Messerli, Lukas Hechelhammer, Sebastian Leschka, Rene Warschkow, Simon Wildermuth & Ralf Bauer

abstract

OBJECTIVES
To determine the value of ultra-low dose chest CT with tin filtration for ordinal coronary artery calcium (CAC) risk scoring.

METHODS
50 patients were prospectively included and underwent clinical standard dose chest CT (1.8±0.7mSv) and ultra-low dose CT (0.13±0.01mSv). Four radiologists estimated presence and extent of CAC.

RESULTS
Weighted kappa values for CAC were 0.76-0.97 in standard dose and 0.75-0.95 in ultra-low dose CT (p<0.001). Good to excellent agreement was observed for CAC ordinal risk assessment, with readers reporting identical risk in 81% of cases.

CONCLUSION
CAC risk can be qualitatively assessed from X-ray dose equivalent ungated chest CT.
   
citation Messerli M, Hechelhammer L, Leschka S, Warschkow R, Wildermuth S, Bauer R. Coronary risk assessment at X-ray dose equivalent ungated chest CT: Results of a multi-reader study. Clin Imaging 2017; 49:73-79.
   
type journal paper/review (English)
date of publishing 25-10-2017
journal title Clin Imaging (49)
ISSN electronic 1873-4499
pages 73-79
PubMed 29149718
DOI 10.1016/j.clinimag.2017.10.014