内頸動脈瘤に対するThree-dimensional computed tomographic angiographyの多方向再構成画像の有用性

Clinical Usefulness of Multi-planar Reconstruction Images of Three-dimensional Computed Tomographic Angiography for Internal Carotid Artery Aneurysms

Ⅰ．はじめに

　Guglielmi detachable coil（GDC）の導入以後^2,3），脳動脈瘤に対する治療として，血管内手術による塞栓術が徐々に増加してきている．しかし，その適応を決定するにあたり，動脈瘤の形状，局在および動脈瘤頸部の大きさを十分に知ることが以前にも増して重要となってきている．今回われわれは内頸動脈瘤に対し，three-dimensional computedtomographic angiography（3D-CTA）のデータを基に多方向再構成（MPR）画像を作製し，その有用性について，3D-CTA, maggetic resonance angio-graphy（MRA），digital subtraction angiography（DSA）と比較検討した．

The usefulness of multi-planar reconstruction (MPR) images of three-dimensional computed tomographic angiography (3D-CTA) for the diagnosis of internal carotid artery (ICA) aneurysms is described. Eleven unruptured ICA aneurysms including six cases of IC-cavernous aneurysm, two cases of IC-ophthalmic artery aneurysm, two cases of IC-posterior communicating artery aneurysm and one cases of IC-anterior choroidal artery aneurysm, were examined by magnetic resonance angiography (MRA), digital subtraction angiography (DSA), 3D-CTA and its MPR images.