Follow-Up of Coiled Intracranial Aneurysms: Comparison of 3D Time-of-Flight MR Angiography at 3T and 1.5T in a Large Prospective Series

Abstract

BACKGROUND AND PURPOSE:Our aim was to compare 3D TOF-MRA sequences at 3T and 1.5T in the follow-up of coiled aneurysms. The follow-up of coiled intracranial aneurysms is mandatory to depict potential recanalization. 3D-TOF MRA is an appropriate tool for this purpose.

WEB-DL Endovascular Treatment of Wide-Neck Bifurcation Aneurysms: Long-Term Results in a European Series

“…However, recent publications confirm the value of MRA in the follow-up of intracranial aneurysms. 16,17 A third limitation is that only WEB-DL (and not WEB-Single Layer and WEB-Single Layer Sphere) treatment was evaluated.…”

One-Year MR Angiographic and Clinical Follow-Up after Intracranial Mechanical Thrombectomy Using a Stent Retriever Device

“…MR imaging performed for 1-year FU benefits from the accuracy of TOF-MRA sequences at 3T, 20 with high-resolution T2 sequences allowing vessel wall analysis.…”

Inter- and Intrarater Agreement on the Outcome of Endovascular Treatment of Aneurysms Using MRA

“…4 By contrast, our primary aim was to test the reproducibility of angiographic outcomes as they are assessed in clinical practice with a variety of modalities (DSA, 1.5T and 3T TOF MRA) that are actually used in realistic cases selected to mimic a clinical series. Although Pierot et al 6 have proposed that contrast-enhanced MRA performed better than TOF-MRA, most studies did not find a significant difference in accuracy between modalities or field strengths (3T or 1.5T), and for pragmatic reasons, patients cannot always be followed on the same equipment. The strengths of the present study also include a large number of observers with various experience and from various institutions and the inclusion of DSA-MRA comparisons that are often used in clinical practice.…”

“…5 Interobserver agreement by using a catheter angiographic scale directly applied to MR angiographic results has been reported as "substantial" and "similar" to angiography, but the number of readings was limited to duplicates. 3,6 A more rigorous evaluation of the agreement in the MR angiographic diagnoses of residual or recurrent aneurysms in patients treated by endovascular coiling by a larger number of observers with various expertise is needed to establish the reliability of MRA diagnoses. 7 In clinical practice, the evolution of treated aneurysms is often followed by comparing the follow-up MRA with the final catheter angiogram of the embolization procedure.…”