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

Publication

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

Journal Paper/Review - Oct 25, 2017

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

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.