Fig 6. Correlations between the maximum ESD and angiographic parameters. Circle indicates a neurointerventional procedure without skin injury; x, patient No. 1 in on-line Table exhibited a depilation; triangle, patient No. 9 in on-line Table exhibited a depilation. A, Correlation between maximum ESD and total exposure time (r = 0.5283, P = .005, n = 27). B, Correlation between maximum ESD and dose-area product (r = 0.7917, P < .001, n = 21). C, Correlation between maximum ESD and total number of DSA studies (r = 0.5636, P = .002, n = 27). D, Correlation between maximum ESD and total number of DSA frames (r = 0.8583, P < .001, n = 23). Lines on the graphs indicate linear regressions.