Three-Dimensional Digital Angiography: New Tool for Simultaneous Three-Dimensional Rendering of Vascular and Osseous Information during Rotational Angiography
Philippe Gaillouda,
Satoru Oishib,
Jeffrey Carpentera and
Kieran J. Murphya
a Division of Interventional Neuroradiology, the Johns Hopkins Medical Institutions, Baltimore, MD
b Toshiba Medical Systems Research and Development Center, Tochigi, Japan
View larger version (54K):
[in a new window]
|
FIG 1. Images obtained in a 36-year-old woman with a right occipital AVM fed by braches of the left posterior cerebral artery. Volume-rendered 3D-DAs from a rotational acquisition in the left VA.
A, Lateral projection shows the small left occipital AVM (arrowheads) and its adjacent draining vein (squiggly arrow). A curve of the anterior-inferior cerebellar artery (AICA) in the internal auditory canal (white arrow) and a fenestrated posterior-inferior cerebellar PICA (gray arrow) with an extracranial loop are demonstrated within their surrounding osseous landmarks.
B, Posteroanterior projection shows the intracanalar segment (arrowheads) of the left AICA (arrow) to better advantage.
| |
View larger version (85K):
[in a new window]
|
FIG 2. Images in a 38-year-old woman with a suboccipital arteriovenous fistula. Lateral volume-rendered 3D-DA of a left VA rotational acquisition shows the extracalvarial arterial supply coursing along the occipital bone to the scalp arteriovenous fistula. The arterial supply is via C1 and, to a lesser extent, C2 muscular branches of the VA. Note the large occipital varix (asterisk). A left posterior meningeal artery (arrowheads) is coursing along the inner aspect of the occipital bone, but it does not participate in vascularization of the lesion.
| |
View larger version (33K):
[in a new window]
|
FIG 3. Volume-rendered 3D-DAs of a right common carotid artery rotational acquisition in 52-year-old woman with a right distal ICA aneurysm, which was incidentally discovered.
A, Lateral view shows the distal right ICA in relation to the adjacent skull. The aneurysm in the superior hypophyseal region (asterisk) and the right ophthalmic artery (arrow) are demonstrated. The relationships of the aneurysm with the clivus (right arrowheads) and the jugum sphenoidale (left arrowheads) are appreciated. Note the specimen-like rendering.
B, Anteroposterior view shows the distal right ICA in relation to the adjacent skull. This view demonstrates the intrasellar location of the aneurysm, which is lying on the floor of the sella (long arrow). Note the jugum sphenoidale (short arrow) and the anterior clinoid processes (asterisk). Also note the dry-bone rendering.
| |
