Improved Image Quality of Intracranial Aneurysms: 3.0-T versus 1.5-T Time-of-Flight MR Angiography
Gordon F. Gibbsa,
John Huston, IIIa,
Matt A. Bernsteina,
Stephen J. Riederera and
Robert D. Brown, Jr.b
a Department of Radiology, Mayo Clinic, Rochester, Minnesota
b Department of Neurology, Mayo Clinic, Rochester, Minnesota
View larger version (116K):
[in a new window]
|
FIG 1. A 54-year-old woman with autosomal dominant polycystic kidney disease.
A and B, 1.5-T (A) and 3.0-T (B) TOF collapsed images. The distal middle cerebral artery branches are better visualized on the 3.0T MR angiogram.
C and D, Subvolume image of 1.5-T TOF MR angiogram (C) demonstrates a 3-mm superior cerebellar artery aneurysm (arrow). 3.0-T TOF MR angiogram (D) depicts the aneurysm (arrow) and the distal posterior cerebral artery branches better than the 1.5-T TOF MR angiogram.
E and F, Source images of the 1.5-T (E) and 3.0-T (F) MR angiograms. The superior signal intensity and spatial resolution of the 3.0-T examination allows visualization of temporal lobe cortex and vermis of the cerebellum.
| |
View larger version (117K):
[in a new window]
|
FIG 2. A 64-year-old woman undergoing screening owing to a family history of aneurysms.
A and B, 1.5-T (A) and 3.0-T (B) TOF collapse images. The distal middle cerebral artery branches are better visualized on the 3.0T MR angiogram.
C and D, 1.5-T (C) and 3.0-T (D) subvolumes demonstrate a 4-mm anterior communicating artery aneurysm. The wall of the aneurysm is more sharply displayed and the adjacent anterior cerebral arteries better separated from the aneurysm on the 3.0-T study. (From Bernstein et al (8). Reprinted by permission of Wiley-Liss.)
| |
AJNR - American Journal of Neuroradiology