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Neuroradiology

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01-05-2008 | Diagnostic Neuroradiology

Three-dimensional time-of-flight MR angiography at 3 T compared to digital subtraction angiography in the follow-up of ruptured and coiled intracranial aneurysms: a prospective study

Authors: H. Urbach, U. Dorenbeck, M. von Falkenhausen, K. Wilhelm, W. Willinek, C. Schaller, S. Flacke

Published in: Neuroradiology | Issue 5/2008

Abstract

Introduction

Since digital subtraction angiography (DSA) carries a low risk of morbidity, and is associated with patient discomfort and higher cost, our objective was to determine whether high-resolution 3-D time-of-flight MR angiography (TOF-MRA) at 3 T may replace DSA in the follow-up of patients after coiling of an intracranial aneurysm.

Methods

This prospective study included 50 consecutive patients with a ruptured and subsequently coiled intracranial aneurysm. All patients were followed up at a mean of 14 months after coiling with DSA and high-resolution 3-D TOF-MRA at 3 T generating 0.02 mm³ isotropic voxels. One examiner used DSA and TOF-MR angiograms to assess the need for and risk of retreatment; these data were used to calculate intermodality agreement. Another two examiners independently assessed aneurysm occlusion by DSA and TOF-MRA according to the Raymond scale; these data were used to calculate interobserver agreement.

Results

Discrepancies between DSA and TOF-MRA were found in three patients (intermodality agreement κ = 0.86). While DSA indicated complete aneurysm occlusion, TOF-MRA showed small neck remnants in the three patients. Coils on all DSA projections obscured these three neck remnants. Interobserver agreement was higher for DSA (κ = 0.82) than for TOF-MRA (κ = 0.68), which was in part due to the complexity of the information provided by TOF source images and reconstructions.

Conclusion

3-D TOF-MRA at 3 T is not only an adjunctive tool but is ready to replace DSA in the follow-up of patients with previously coiled intracranial aneurysms. Additional DSA may only be performed in complex and not clearly laid out aneurysms.

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Title: Three-dimensional time-of-flight MR angiography at 3 T compared to digital subtraction angiography in the follow-up of ruptured and coiled intracranial aneurysms: a prospective study
Authors: H. Urbach
U. Dorenbeck
M. von Falkenhausen
K. Wilhelm
W. Willinek
C. Schaller
S. Flacke
Publication date: 01-05-2008
Publisher: Springer-Verlag
Published in: Neuroradiology / Issue 5/2008
Print ISSN: 0028-3940
Electronic ISSN: 1432-1920
DOI: https://doi.org/10.1007/s00234-007-0355-5

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Three-dimensional time-of-flight MR angiography at 3 T compared to digital subtraction angiography in the follow-up of ruptured and coiled intracranial aneurysms: a prospective study

Abstract

Introduction

Methods

Results

Conclusion

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Introduction

Methods

Results

Conclusion

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