微小ガラスビーズパッドを使用した頸部および手指のMRI脂肪抑制効果の向上について

摘要

近年，magnetic resonance imaging (MRI)検査では， 三次元収集画像が多用されるようになってきている.T_1強調三次元収集画像では，撮像時間を考慮して，gradient echo (GRE)系列の撮像シーケンスが選択されることが多いが，これらの撮像では磁化率ァ一チファクトの影響が問題となる.特に脂肪抑制を付加したT_1強調画像では，脂肪抑制の不良を来すことが多い.%The defectiveness of the fat suppression becomes the factor of the decrease of the quality of the diagnosis of magnetic resonance imaging. It is reported that the use of magnetic field uniformity adjuvant pad is effective for reduce poor fat suppression. The ball bullets, polystyrene balls, and polished rice are used for pad packing material, in recently, it was reported that fat suppression effect was good by the use of the small glass beads. Therefore, we tested the utility of small glass beads pad in the neck and fingers in this study. Neck and the fingers of subjects were imaged with T_1-weighted image with fat suppression and T_1-high resolution isotropic volume excitation image. The fat suppression effect of each image was compared with the polished rice and glass beads as material of pad used by physical, observation, and contact evaluation. In the result, satisfactory results were obtained by using glass beads, and it is suggested that fat suppression effect is improved by using glass beads as a filling material of pad in clinical study as a conclusion.