Figure 2.

Relationships between brachial artery and vein enhancement and patient characteristics. Scattergrams of the relationship between arterial enhancement obtained using the protocol involving a fixed dose of iodinated contrast material and the patients age (A), height (B), total body weight (C), body mass index (D), body surface area (E), lean body weight (F), and scan delay (G). There was a significant positive correlation between the CT number of the brachial artery or vein and age (R = 0.21 or 0.23, P < .01). The correlations were inverse with the height (r = −0.45 or −0.42), total body weight (r = −0.52 or −0.50), body mass index (r = −0.21 or −0.23), body surface area (r = −0.56 or −0.54), and lean body weight (r = −0.55 or −0.53) in linear regression analysis (P < .01 for all). There was a significant correlation between the CT number of the brachial artery or vein and scan delay (R = 0.19 or 01.9, P < .01). CT = computed tomography.