Usefulness and Limitation of Cerebral Aneurysm Clipping Using Titanium Clip

Usefulness of Pointwise Encoding Time Reduction with Radial Acquisition and Subtraction-Based Magnetic Resonance Angiography after Cerebral Aneurysm Clipping

“…The CCNM alloy causes a very strong metal artifact compared with titanium. 7 , 8 , 11 Shortening of the echo time reduces clip-induced artifacts. 2 , 14 , 15 However, the effect on the CCNM alloy was insufficient using PETRA-MRA with a UTE of 0.07 ms.…”

“…To assess the association between the MRA findings and these factors, a multivariate analysis was performed using a binominal logistic regression model. The 2 patients with CCNM clips were evaluated individually because the CCNM alloy is known to produce large artifacts 7 , 11 and is rarely used at present. The interrater agreement for each of the MRA techniques was evaluated using Fleiss's fixed marginal multirater kappa using the Online Kappa Calculator (available at: http://justusrandolph.net/kappa/ ).…”