Publication

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

Journal Paper/Review - Oct 25, 2017

Units
PubMed
Doi

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)
Journal
Clin Imaging 2017; 49
Publication Date
Oct 25, 2017
Issn Electronic
1873-4499
Pages
73-79
Brief description/objective

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.