Comparing the average number of afferent veins found on MDCT and DSA The afferent veins MDCT DSA p 14 Average 1.4 ± 0.6 (1 - 3 veins) 1.6 ± 0.7 (1 - 3 veins) p = 0.0029 Total nuturing veins 69 79 Comment: The average number of afferent veins found on DSA was statistically significant higher than that on MDCT, with p = 0.0029.