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

Naka Takanori, Takahashi Mitsuyuki, Takeda Koutarou, Igarashi Tarou, Hondera Tetsukazu

doi:10.6009/jjrt.2017_jsrt_73.2.104

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Other Title

頸動脈プラークを対象とした至適T1 強調画像の検討―異なるMRI 装置間で定量評価に与える影響について―
頸動脈プラークを対象とした至適T₁強調画像の検討 : 異なるMRI装置間で定量評価に与える影響について
ケイドウミャクプラークオタイショウトシタシテキ T ₁ キョウチョウガゾウノケントウ : コトナル MRI ソウチカンデテイリョウヒョウカニアタエルエイキョウニツイテ

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Abstract

Carotid artery plaques with high-signal intensity on T₁ weighted image (T₁ WI) are known to cause cerebral ischemic disease. Signal intensity ratio (SIR), which is calculated from T₁ WI in the quantitative evaluation of plaque characterization have been used. However, the various sequences in T₁ 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 T₁ WI sequence in MR carotid plaque imaging. We directly compared four kinds of T₁ 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 T₁ WI uses a different MRI device, equal SIR is provided. Therefore, 2D SE is appropriate to evaluate the characteristics of carotid plaque.

Journal

Japanese Journal of Radiological Technology

Japanese Journal of Radiological Technology 73 (2), 104-111, 2017

Japanese Society of Radiological Technology

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