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).