MR angiography of the primitive trigeminal artery: report on two cases.

Although conventional or digital X-ray angiography is still the standard method in the diagnosis of intracranial vascular abnormalities, MR imaging is gaining a more prominent role in this respect. MR angiography is a new method of vascular imaging that provides projection images resembling conventional angiography [1 , 2]. We present the MR angiographic findings in two patients with primitive trigeminal arteries, which were found incidentally on digital subtraction angiography (DSA) or MR imaging studies.