Follow-up of intracranial aneurysms treated with detachable coils: comparison of 3D inflow MRA at 3T and 1.5T and contrast-enhanced MRA at 3T with DSA

Abstract

3T MRA, using a sensitivity encoding head-coil, showed better agreement with DSA than 1.5T and CE-MRA at 3T for evaluation of aneurysms treated with endovascular coiling.

A Prospective Trial of 3T and 1.5T Time-of-Flight and Contrast-Enhanced MR Angiography in the Follow-Up of Coiled Intracranial Aneurysms

“…[7][8][9][10][11][12][13][14][15][16][17][18][19]24 In summary, some of these studies showed results similar to those in our current study, and some showed the superior performance of MRA relative to DSA compared with that in our current study, though some of these differences are very likely related to the differences in the aneurysm occlusion scales used. Conflicting conclusions regarding the performance of MRA relative to DSA and of the performance of various MRA techniques relative to each other certainly still exist, however.…”

“…There remains ambiguity over the overall performance of MRA relative to DSA in the depiction of coiled aneurysm remnants and in the relative performance of TOF-MRA, bolus gadolinium CE-MRA, and MRA performed at the field strengths of 1.5 T versus at 3T, with different groups reporting conflicting results. [6][7][8][9][10][11][12][13][14][15][16][17][18][19] We wished to prospectively study the performance of MRA relative to DSA for the clinical indication of the follow-up of coiled intracranial aneurysms, and more specifically, we wished to study the relative performance of the 2 major types of MRA at 2 popular main magnetic field strengths, 1.5 and 3T. We present the results of a prospective clinical trial comparing the accuracies of 4 different MRA techniques, TOF and CE-MRA both at 1.5T and at 3T, by using DSA as the standard of reference in the follow-up of coiled intracranial aneurysms.…”

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

“…10 Another small series showed that 3T MRA had better agreement with DSA than 1.5T MRA and that coil artifacts were smaller at 3T than at 1.5T. 12 In our large series of 126 coiled intracranial aneurysms, 3D TOF-MRA at 3T was superior to 3D TOF-MRA at 1.5T to evaluate the quality of aneurysm occlusion. Regardless of the scale used to analyze aneurysm occlusion, the interobserver agreement was always greater with 3T compared with 1.5T.…”

“…[7][8][9][10] Direct comparison of MRA performed at 3T and 1.5T is relatively scarce, has been conducted in small series of patients, and is associated with contradictory results. [11][12][13] To compare the value of 3D-TOF at 1.5T and 3T, a prospective consecutive monocentric study was conducted in patients having follow-up examinations including DSA for coiled intracranial aneurysms. In this group of patients, 3D TOF-MRA was performed at both 3T and 1.5T.…”

Neuroform Stent−Assisted Coiling of Unruptured Intracranial Aneurysms: Short- and Midterm Results from a Single-Center Experience with 68 Patients

“…28,29 However, stent-related artifacts compromise the evaluation of the true lumen of the parent artery. 30 Fiorella et al 31 reported an incidence of 5.8% of delayed Neuroform instent stenosis. In their series of 156 aneurysms, 9 patients developed a moderate-to-severe stenosis and 2 of them had a complete vessel occlusion.…”