Coronary artery calcium scoring at lower tube voltages – Dose determination and scoring mechanism

Purpose Population dose has been a concern with coronary artery calcium scoring CT since it is performed in adults with borderline risk. Lower tube voltage acquisitions are appealing but there are no agreed schemes for reduced dose determination. Moreover, conventional scoring cannot be used without changing the multiple Agatston thresholds. Methods By applying consistent calcium contrast-to-noise ratio to two anthropomorphic heart phantoms...