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Carotid artery plaques with high-signal intensity on T 1 weighted image (T 1 WI) are known to cause cerebral ischemic disease. Signal intensity ratio (SIR), which is calculated from T 1 WI in the quantitative evaluation of plaque characterization have been used. However, the various sequences in T 1 WI and difference in the sequences were utilized among institutions. Therefore, difference in sequence may influence SIR. The purpose of this study was to evaluate the optimization of T 1 WI sequence in MR carotid plaque imaging. We directly compared four kinds of T 1 WI imaging techniques, including inversion recovery (IR)-3 dimensional (3D) gradient echo (GRE), 3D fast spin echo (FSE), 2 dimensional (2D) FSE, 2D spin echo (SE), among different magnetic resonance imaging (MRI) scanner. As a result, the 2D SE method had the smallest difference in SIR. Even if 2D SE T 1 WI uses a different MRI device, equal SIR is provided. Therefore, 2D SE is appropriate to evaluate the characteristics of carotid plaque.

nippon hoshasen gijutsu gakkai zasshi/nihon houshasen gijutsu gakkai zasshi

Optimization of T<sub>1</sub>-weighted Imaging Parameters in MR Carotid Plaque Imaging: Influence for the Quantitative Evaluation among Different MRI Scanner Types

Optimization of T1-weighted Imaging Parameters in MR Carotid Plaque Imaging: Influence for the Quantitative Evaluation among Different MRI Scanner Types

Optimization of T₁-weighted Imaging Parameters in MR Carotid Plaque Imaging: Influence for the Quantitative Evaluation among Different MRI Scanner Types