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Fig. 2. —Receiver operating characteristic curves of data sets per vascular zone. Areas under curves of data sets A, B, and C are 0.96, 0.94, and 0.96, respectively. Per–vascular zone diagnostic capability of data set A was slightly better than that of data set B and was equal to that of data set C. {square} = time-resolved contrast-enhanced MR angiography alone (data set A), {blacksquare} = contrast-enhanced MDCT alone (data set B), {blacksquare} = contrast-enhanced MDCT with time-resolved contrast-enhanced MR angiography (data set C).