Table 2.

Measurements.

Case	pre3D iUS Doppler vs. preMRI			post3D iUS Doppler vs. preMRI
	Vascular Structure	Euclidean Distance [mm]	Mean Euclidean Distance [mm]	Vascular Structure	Euclidean distance [mm]	Mean Euclidean Distance [mm]
1	ICAbif	5.1	6.0	ICAbif	4.9	5.0
	M1bif	6.9		M1bif	5.0
2	ICAbif	3.8	3.5	ICAbif	2.4	2.9
	M1bif	3.4		M1bif	3.4
	M2bif	4.9		M2bif	3.0
	M1cont	1.86		M1cont	2.9
3	–	–	–	ACIbif	5.2	5.2
				Basilar tip	5.1
4	ICAbif	4.5	4.3	ICAbif	3.4	4.5
	M1bif	4.0		M1bif	5.5
5	–		4.0	ICAbif	6.2	6.0
	M1bif	4.0		M1bif	5.7
6	ICAbif	3.2	2.6	ICAbif	6.2	4.8
	M1bif	2.0		Basilar tip	4.1
				A2	4.2

A2, A2 segment of anterior cerebral artery; ICAbif, internal carotid artery bifurcation; M1bif, M1bifurcation segment of the MCA; M1cont, vascular contact of M1 to another vascular branch; M2, M2 segment of MCA; MCA, middle cerebral artery; pre3D iUS Doppler, pre-resectional 3D iUS Doppler; post3D iUS Doppler, post-resectional 3D iUS Doppler.