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• W2947144867 abstract "Sildenafil and calcitonin gene-related peptide both dilate the intradural segments of the middle meningeal artery measured with 3.0 tesla (T) MR angiography. Here we hypothesized that an increase in field strength to 7.0 T and concomitant enhanced voxel resolution would lower variance in measurements of dilation in the intradural middle meningeal artery.Five subjects completed two sessions at respectively 3.0 T and 7.0 T. Each session comprised MR angiography scans once before and twice after administration of sildenafil, calcitonin gene-related peptide or placebo in a three-way, crossover, double-blind, placebo-controlled design.Standard deviations of arterial circumference revealed no difference between 3.0 T and 7.0 T measurements (p = 0.379). We found a decrease in standard deviation from our original angiography analysis software (QMra) to a newer (LAVA) software package (p < 0.001). Furthermore, we found that the dilation after sildenafil and calcitonin gene-related peptide were comparable between 3.0 T and 7.0 T.Our findings suggest no gain from the increase in voxel resolution but cemented dilatory findings from earlier. The implemented software update improved variance in circumference measurements in the intradural middle meningeal artery, which should be exploited in future studies.The study is part of a parent study, which is registered at ClinicalTrials.gov ( NCT03143465 )." @default.
• W2947144867 created "2019-06-07" @default.
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• W2947144867 date "2019-05-06" @default.
• W2947144867 modified "2023-10-14" @default.
• W2947144867 title "Ultra-high field MR angiography in human migraine models: a 3.0 T/7.0 T comparison study" @default.
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• W2947144867 doi "https://doi.org/10.1186/s10194-019-0996-x" @default.
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