Affordable Access

Publisher Website

MR angiography of intracranial aneurysms: A comparison of 0.5 T and 1.5 T

Authors
Journal
Computerized Medical Imaging and Graphics
0895-6111
Publisher
Elsevier
Publication Date
Volume
21
Issue
2
Identifiers
DOI: 10.1016/s0895-6111(96)00064-x
Keywords
  • Aneurysm
  • Intracranial
  • Blood Vessels
  • Cerebral
  • Magnetic Resonance Imaging
  • Magnetic Resonance Angiography (Mra)
Disciplines
  • Computer Science
  • Medicine

Abstract

Abstract The objective of this paper is to compare the diagnostic efficacy of 3 DFT time-of-flight MR angiography (MRA) at middle-field-strength and high-field-strength in diagnosis of intracranial aneurysms. Thirty-one patients, including 26 patients with angiographically confirmed intracranial aneurysms ( n = 28), underwent MRA at 0.5 and 1.5 T. Images were interpreted by six trained observers who were blinded to diagnosis. Twelve projections of MRA of the circle of Willis, by maximum-intensity projection algorithm, were reviewed using continuous confidence-judgment scales. It was found that MRA at 1.5 T was more sensitive than that at 0.5 T in detection of aneurysms. The sensitivity of six observers ranged between 50 and 64% (mean 56%) at 0.5 T, and between 61 and 86% (mean 75%) at 1.5 T. In the smaller aneurysms less than 5 mm, the differences between the units became greater. The sensitivity for small aneurysms ranged from 23 to 54% (mean 32%) at 0.5 T, and from 31 to 69% (mean 58%) at 1.5 T. Our conclusion was that high field strength confers higher accuracy in the detection of intracranial aneurysms with MRA with current-generation MR imagers.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Follow-up of coiled intracranial aneurysms: compar...

on American Journal of Neuroradio... December 2012

MR angiography of intracranial aneurysms: a compar...

on Computerized Medical Imaging a... 1997

Contrast-enhanced MR angiography at 3T in the eval...

on American Journal of Neuroradio... 2006
More articles like this..