Table 3

Analysis of microvascular findings between 2D DSA, 3D DSA and 4D DSA in patients with AVMs

	2D DSA			3D DSA			4D DSA
Patients*	Definition of the nidus and AV shunt	Arterial feeders	Venous drainage†	Definition of the nidus and AV shunt	Arterial feeders	Venous drainage†	Definition of the nidus and AV shunt	Arterial feeders	Venous drainage†
P_09	+	+++	+++	++	+++	+++	+++	+++	+++
P_10‡	+	++	+++	++	++	+++	+++	+++	+++
P_11	+	++	++	+	++	++	++	+++	+++
P_12	++	+++	+++	++	+++	+++	+++	++	++
P_13	+	+	++	++	++	++	++	++	++
P_14	+	++	++	+	++	++	++	+++	+++
P_15	++	++	++	+	++	++	++	++	++
P_16	+	+	+	+	+	++	++	++	+++
P_17	+++	++	+++	+++	++	+++	+++	+++	+++
P_18	++	++	++	++	++	++	+++	++	+++
P_19	++	++	++	+	+	+	+	+	++
P_20	++	++	++	++	++	++	+++	+++	+++
P_21	NA	++	+++	NA	++	++	NA	+++	+++
P_22	+++	++	+++	++	++	++	++	++	++
P_23	++	++	++	+	++	++	++	+++	+++
P_24	++	++	++	++	++	++	++	++	++
P_25	+++	++	++	++	++	++	+++	++	++
P_26	++	++	++	++	++	++	++	++	++
P_27	+	+	++	++	++	++	+++	+++	+++
Median	2	2	2	2	2	2	2	2	3

Rating according to the ability to visualize the microvascular findings: +++ (3), good visualization; ++ (2), moderate visualization; + (1), poor visualization; NA (0), not applicable.
*Patients analogous to table 1.
†Venous drainage under special consideration of reflux into cortical veins.
‡Time-consuming post-processing time-resolved display of the nidus helpful to differentiate between arteries and veins.
AVM, arteriovenous malformation; DSA, digital subtraction angiography.