Normal variants of the intracranial circulation demonstrated by MR angiography at 3T.
Magnetic resonance angiography (MRA) at 3T offers increased signal to noise ratio with better background suppression, leading to exquisite depiction of the intracranial circulation. We present a pictorial review of the normal variations and anomalies of the intracranial circulation detected on MRA performed on a high field 3T clinical scanner using parallel imaging techniques. The salient imaging features of these anomalies and normal variations are discussed with relevance to clinical practice.
Parmar
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National Neuroscience Institute, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore. parurad@hotmail.com
Sitoh
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Hui
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D020771:Anterior Cerebral Artery / Q000002:abnormalities / Q000473:pathology; D001488:Basilar Artery / Q000002:abnormalities / Q000473:pathology; D002343:Carotid Artery, Internal / Q000002:abnormalities; D002539:Cerebral Arterial Diseases / Q000175:diagnosis; D002536:Cerebral Arteries / Q000002:abnormalities / Q000033:anatomy & histology*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D020768:Middle Cerebral Artery / Q000002:abnormalities / Q000473:pathology; D020769:Posterior Cerebral Artery / Q000002:abnormalities / Q000473:pathology; D014711:Vertebral Artery / Q000473:pathology