[Delineation of cerebral aneurysms with fly-through imaging of 3D-MRA using perspective volume rendering]

We used fly-through (FT) imaging of three-dimensional MR Angiography (3D-MRA) with perspective volume rendering to delineate cerebral aneurysms. Four unruptured cerebral aneurysms discovered incidentally on MRA were delineated as FT images and compared with maximum intensity projection (MIP) images. FT imaging was superior to MIP in the realistic representation of cerebral aneurysms from an extraluminal point of view. FT imaging of 3D-MRA may be helpful for the spatial representation of an aneurysm, thereby improving diagnostic accuracy of MRA for cerebrovascular diseases.