Fig. 5From: Intra-operative ultrasound (IOUS) value in cases of AVM and cavernoma excision: single-center experienceIOUS of AVM Case. Color Doppler image showing bidirectional, high-blood flow within the tubular structures, suggestive of blood flow within an AVM (red arrow). It also gives an idea about the depth of resection needed (here up to 3Â cm depth) (white arrow). Color Doppler and its relation to the adjacent dural folds (tentorium cerebelli) (green arrow). High pattern of flow in the nidus which exceeds 25Â m/s detected by spectral Doppler US (blue arrow)Back to article page