Low Russell N, Ma Jingfei, Panchal Neeraj
San Diego Imaging Medical Group, San Diego, California, USA.
J Magn Reson Imaging. 2009 Sep;30(3):569-77. doi: 10.1002/jmri.21880.
To evaluate a prototype fast spin echo (FSE) triple-echo-Dixon (fTED) technique for breath-hold, fat-suppressed, T2-weighted abdominal imaging.
Forty patients underwent breath-hold T2-weighted abdominal imaging with fTED and conventional fast recovery (FR) FSE with chemical shift-selective saturation (CHESS). FRFSE and fTED images were compared for overall image quality, homogeneity of fat suppression, image sharpness, anatomic detail, and phase artifact. Depiction of disease was recorded separately for FRFSE and fTED images.
FTED successfully reconstructed water-only and fat-only images from source images in all 40 cases. Water and fat separation was perfect in 36 (0.90) patients. Homogeneity of fat suppression was superior on the fTED images in 38 (0.95) of 40 cases. FTED images showed better anatomic detail in 27 (0.68), and less susceptibility artifact in 20 (0.50). FRFSE images showed less vascular pulsation artifact in 30 (0.75) cases, and less phase artifact in 21 (0.53) cases. There was no difference in depiction of disease for FRFSE and fTED images.
FTED is a robust sequence providing breath-hold T2-weighted images with superior fat suppression, excellent image quality, and at least equal depiction of disease compared to conventional breath-hold T2-weighted FRFSE imaging.
评估一种用于屏气、脂肪抑制、T2加权腹部成像的快速自旋回波（FSE）三回波狄克逊（fTED）技术原型。
40例患者接受了fTED屏气T2加权腹部成像以及采用化学位移选择性饱和（CHESS）的传统快速恢复（FR）FSE成像。比较FRFSE和fTED图像的整体图像质量、脂肪抑制均匀性、图像清晰度、解剖细节和相位伪影。分别记录FRFSE和fTED图像上疾病的显示情况。
fTED在所有40例病例中均成功从源图像重建了仅含水和仅含脂肪的图像。36例（占0.90）患者的水脂分离效果完美。40例中的38例（占0.95），fTED图像上的脂肪抑制均匀性更佳。27例（占0.68）fTED图像显示出更好的解剖细节，20例（占0.50）显示出更少的磁敏感伪影。30例（占0.75）FRFSE图像显示出更少的血管搏动伪影，并在21例（占0.53）中显示出更少的相位伪影。FRFSE和fTED图像在疾病显示方面没有差异。
fTED是一种可靠的序列，与传统的屏气T2加权FRFSE成像相比，它能提供脂肪抑制效果更佳、图像质量优异且疾病显示至少相当的屏气T2加权图像。
