Ishikawa Clinic, 46-1 Shimokamo-Umenoki-cho, Sakyo-ku, Kyoto-shi, Kyoto 606-0851, Japan.
Eur J Radiol. 2012 Sep;81(9):2318-22. doi: 10.1016/j.ejrad.2011.06.021. Epub 2011 Jun 25.
When chemical shift selective (CHESS) imaging is used with magnetic resonance imaging (MRI) for simultaneous imaging of both hands for the evaluation of rheumatoid arthritis, the fat suppression effect is poor. We investigated whether these fat-suppressed images using CHESS could be improved with the use of rice pads. T1-weighted images were obtained with CHESS and the same imaging parameters were used with and without rice pads on the coronal plane of both hands in 10 healthy volunteers. Patients were placed in a prone position with both hands extended overhead. The fat-suppression effect was classified into four categories and scored for both sets of images, and visual assessments were made by one radiologist and one radiologic technologist. The evaluation score was 1.1 for the images made without rice pads, and 3.2 for the images made with rice pads. The fat suppression effect was thus significantly better in the images made using rice pads (P<0.0001). Lingering fat signals disappeared almost completely in images of both hands using CHESS with rice pads, and it was confirmed that the images were improved and had good fat suppression. More accurate evaluation of inflammatory sites that occur in rheumatoid arthritis may thus be possible, promising better diagnostic accuracy.
当化学位移选择性（CHESS）成像与磁共振成像（MRI）联合用于同时成像双手以评估类风湿关节炎时，脂肪抑制效果不佳。我们研究了在双手冠状面上使用 CHESS 时是否可以通过使用稻垫来改善这些脂肪抑制图像。在 10 名健康志愿者中，使用 CHESS 获得 T1 加权图像，并在没有和有稻垫的情况下使用相同的成像参数。患者取俯卧位，双手伸向头顶上方。将脂肪抑制效果分为四类，并对两组图像进行评分，由一名放射科医生和一名放射技师进行视觉评估。未使用稻垫的图像评分为 1.1，使用稻垫的图像评分为 3.2。因此，使用稻垫的图像脂肪抑制效果明显更好（P<0.0001）。在使用稻垫的 CHESS 图像中，双手的残留脂肪信号几乎完全消失，证实图像得到了改善，并且脂肪抑制效果良好。因此，可能可以更准确地评估类风湿关节炎中发生的炎症部位，从而提高诊断准确性。
