title: Collateral circles in carotid artery occlusion. A comparative study between CW Doppler and contrast angiography.
mesh_terms: D002339:Carotid Arteries / Q000000981:diagnostic imaging*; D002341:Carotid Artery Thrombosis / Q000000981:diagnostic imaging / Q000503:physiopathology*; D003097:Collateral Circulation; D006801:Humans; D011859:Radiography; D012212:Rheology