Fig. 4
From: Diagnosing moyamoya syndrome using ultrasound - a case report
Transcranial 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 network