MDCT in neurovascular imaging

Abstract

New generations of multi-detector row CT (MDCT) scanners offer previously unsurpassed options in neurovascular imaging especially for the emergency diagnosis of cerebrovascular diseases. Comprehensive stroke imaging now typically includes CT angiography and CT perfusion in addition to non-contrast-enhanced CT (NECT). Moreover, modern techniques also enable the retrieval of dynamic CT-angiographic data from the perfusion CT. CT angiography of the cervicocranial arteries allows the assessment of the location and degree of supraaortic extra- and intracranial stenoses as well as of occlusions of the basilar artery. In addition, intracranial aneurysms can be detected with high sensitivity and specificity. Cerebrovenous thromboses can be diagnosed with a venous CT angiography of the brain. Even thromboses of small bridging and internal cerebral veins can usually be readily discerned.