Contrast attenuation of the DDFT and arteries – Second
phase
Table 2 describes the attenuation values of the second phase.
HUpost – HUpre of the DDFT showed
significant differences among groups (P = 0.0003). Group C showed
significantly higher CE (P < 0.05). With respect to palmar
arteries, CE in medial and lateral palmar arteries showed significant
differences among groups (medial: P = 0.002; lateral: P = 0.001). Group
G showed a significantly lower in the CE than other groups, except for
group F in the medial palmar artery and groups C and E in the lateral
palmar artery (P < 0.05).
In 300 mg I/s of fixed IDR, volume and rate negatively correlated with
HUpost − HUpre of the DDFT (volume: P =
0.0002, r = -0.77; rate: P = 0.02, r = -0.54). Conversely, a positive
correlation was found between volume and CE of the medial and lateral
palmar arteries (medial: P = 0.02, r = 0.54; lateral: P = 0.03, r =
0.52); the rate also showed a positive correlation with CE of the medial
and lateral palmar arteries (medial: P = 0.02, r = 0.54; lateral: P =
0.03, r = 0.52). In 180 mg I/s of IDR, HUpost −
HUpre of the DDFT showed a negative correlation with
volume and rate (volume: P = 0.003, r = -0.66; rate: P = 0.005, r =
-0.63). CE of the medial and lateral palmar arteries also showed
negative correlation with volume and rate (volume: P = 0.005, r = -0.63
in the medial palmar artery and P = 0.004, r = -0.64 in the lateral
palmar artery; rate: P = 0.005, r = -0.63 in the medial palmar artery
and P = 0.004, r = -0.64 in the lateral palmar artery).