Fig 2. Bland-Altman plot for the agreement of automatically determined CAC on planning breast CT.

CAC (Agatston) scores were assessed in two scans of the same patient in a set of 294 breast cancer patients using radiotherapy planning CT scans. Mean (X) = 7.6, standard deviation = 128.7, back log transformed upper limit of agreement = 1.4*X, back log transformed lower limit of agreement = -1.4*X, 2A is full plot, 2B is zoomed plot.