Fig. 4From: Diagnosing moyamoya syndrome using ultrasound - a case reportTranscranial Doppler- and duplex-sonography right, showing deteriorated Doppler-spectrum in the distal portion of the internal carotid artery (a) and proximal portion of the middle cerebral artery (b) indicating the vessel obliteration; in accordance with sonographic findings the conventional angiography (c) confirmed the obliteration of the middle cerebral artery and anterior cerebral artery (red arrows). Image (d) demonstrates the collateral networkBack to article page