A 42 year old man whithout prior cardiovascular or neurological history presented to the emergency room three hours after onset of right hemiplegia and global aphasia. Emergency MRI disclosed early signs of middle cerebral artery ischaemia (MCA) on T2 weighted (figure, A) and diVusion weighted (figure, B) images. MR angiography using an ultrafast gadolinium contrast enhanced three dimensional t...

Internal Carotid Artery Occlusion Diagnosed by Doppler Ultrasound • Using a transcutaneous Doppler ultrasonic blood velocity detector, retrograde ophthalmic artery blood flow was demonstrated in four patients, all of whom had angiographically confirmed occluded internal carotid arteries. In three, compression of the facial artery obliterated the ophthalmic artery signal. In a fourth patient com...

One hundred twenty eight cervical carotid arteriograms were twice viewed by three readers for the evaluation of atherosclerotic disease at the carotid bifurcation. Stenoses were estimated using calipers to the nearest 5% and lesions were qualitatively characterized as smooth, irregular, or ulcerated. The intraobserver correlation coefficient between estimates of percent stenosis was .94 overall...