Related Experiment Videos
Arterial pseudostenosis on first-pass gadolinium-enhanced three-dimensional MR angiography: new observation of a
P Chiowanich1, D G Mitchell, H V Ortega
1Department of Radiologic Sciences, Medical College of Pennsylvania, Philadelphia 19129, USA.
Objective:
The purpose of this study was to determine the frequency of apparent stenosis of normal aortic branches in patients on first-pass gadolinium-enhanced three-dimensional (3D) MR angiography and to reproduce the same phenomenon in a pulsatile flow phantom model.
Conclusion:
Apparent stenosis of normal vessels on gadolinium-enhanced 3D MR angiography seen on the first-pass acquisition was observed in only a small proportion (approximately 2%) of our patients. The pseudostenosis was reproducible in the phantom model using rapid injection. A stenosis on first-pass images should be interpreted with caution. Confirmation of the findings on other sequences, such as the second-pass gadolinium-enhanced 3D MR angiography or 3D phase-contrast MR angiography, prevented overdiagnosis of significant stenoses.