MDCT Angiography for Detection and Quantification of Small Intracranial Arteries: Comparison with Conventional Catheter Angiography

Abstract

Except for the recurrent artery of Heubner and the anterior choroidal artery, MDCT angiography depicted 90% or more of all examined small intracranial arteries detected with digital subtraction angiography. The mean sensitivity was 0.91, and the mean specificity was 0.7.

Persistent primitive hypoglossal artery and fenestration of posterior cerebral artery: CT and MR angiography

“…3D CTA may not detect small multiple aneurysms and aneurysms of the posterior communicating artery 11 . Villablanca and colleagues recently described the smallest arterial size reliably detected with multislice CTA as being 0.7 mm (4-16 slice Scanner) versus 0.4 mm for DSA 17 . Although improved spatial resolution has been reported for 3D TOF MRA 15 , CTA and DSA are superior when small vessel disease has to be addressed 10 .…”

A small left pupil and a headache

“…Computed tomography (CT) angiography is rapidly emerging as a highly sensitive and specific modality for large and medium vessel pathologies of the head and neck. 6 In a recent study comparing CT and magnetic resonance (MR) angiography, it was demonstrated that CT angiography is the ideal cross-sectional modality to outline the imaging features of cervical dissections. 7 Almost 85% of extracranial dissections heal spontaneously.…”

Avaliação morfológica e angiográfica por tomografia computadorizada e ressonância magnética do círculo arterial do cérebro.

“…Os ramos perfurantes oriundos dos componentes do CAC nem sempre são visíveis nos estudos de angioTC, porém, são de fundamental importância nos planejamentos terapêuticos, uma vez que irrigam todo o território central da base do crânio (VILLABLANCA et al, 2007). Pertencem a esse grupo: as artérias lenticuloestriadas mediais, os ramos do segmento A1 da ACA e a artéria estriada média (recorrente de Heubner).Esta artéria supre a parte anterior do núcleo caudado, o terço anterior do putame, uma pequena parte do globo pálido e o ramo anterior da cápsula interna.…”

“…Essa artéria pode, ainda, originar-se na ACoA ou nos segmentos A1 ou A2 da ACA. Ramos hipotalâmicos que irrigam o infundíbulo, o quiasma óptico, a área subcalosa e a área pré-óptica do hipotálamo, se originam da ACoA (HARNSBERGER et al, 2007;VILLABLANCA et al, 2007;YASARGIL, 1984).…”

“…As artérias talamoperfurantes anteriores nascem das artérias comunicantes posteriores e as talamogeniculadas e talamoperfurantes posteriores podem nascer tanto da AB quanto das artérias cerebrais posteriores (ACPs) (HARNSBERGER et al, 2007;VILLABLANCA et al, 2007). De acordo com Yasargil (1984), a variação dos componentes do CAC é a regra, embora na maioria das vezes um anel quase completo seja observado.…”