[Delineation of cerebral aneurysms with transluminal imaging of three-dimensional MRA]

We used transluminal imaging with perspective volume rendering of magnetic resonance angiography in patients with unruptured cerebral aneurysms. Selective changes in the opacity chart of signal intensity values, based on using a spiked peak curve, represented the contour of vessels and aneurysmal walls as a series of rings, which provided a transluminal view inside and/or outside the vessel lumen through the spaces between the rings. This imaging technique allowed direct visualization of the underlying objects and offered an extensive perspective view of the architecture of an aneurysm, including an aneurysm and its parent arteries through the overlying vessel or aneurysmal walls, or through both in a single view. Transluminal imaging may be a useful adjunct modality for the intra- and extraluminal diagnosis of a cerebral aneurysm, and for simulation of the interventional and surgical procedures for cerebral aneurysms.