Vahlensieck M, Lang P, Seelos K, Yang-Ho Sze D, Grampp S, Reiser M
Department of Radiology, University of Bonn, Germany.
Skeletal Radiol. 1994 Nov;23(8):607-10. doi: 10.1007/BF02580382.
The value of T2-weighted fast spin-echo imaging of the musculoskeletal system was assessed in 22 patients with various neoplastic, inflammatory, and traumatic disorders. Images were acquired with high echo number (i.e., echo train length) fast spin-echo (FSE; TR 2000 ms, effective TE 100 ms, echo number 13, linear k-space ordering), conventional spin-echo (SE; TR 2000 ms, TE 100 ms) and gradient-echo (GRE) sequences (TR 600 ms, TE 34 ms, flip angle 25 degrees). Signal intensities, signal-to-noise ratios, contrast, contrast-to-noise ratios, lesion conspicuousness, detail perceptibility, and sensitivity towards image artifacts were compared. The high signal intensity of fat on FSE images resulted in a slightly inferior lesion-to-fat contrast on FSE images. However, on the basis of lesion conspicuity, FSE is able to replace time-consuming conventional T2-weighted SE imaging in musculoskeletal MRI. In contrast, GRE images frequently showed superior lesion conspicuity. One minor disadvantage of FSE in our study was the frequent deterioration of image quality by blurring, black band, and rippling artifacts. Some of these artifacts, however, can be prevented using short echo trains and/or short echo spacings.
对22例患有各种肿瘤、炎症和创伤性疾病的患者进行了肌肉骨骼系统T2加权快速自旋回波成像的价值评估。使用高回波数（即回波链长度）快速自旋回波（FSE；TR 2000 ms，有效TE 100 ms，回波数13，线性k空间排序）、传统自旋回波（SE；TR 2000 ms，TE 100 ms）和梯度回波（GRE）序列（TR 600 ms，TE 34 ms，翻转角25度）采集图像。比较了信号强度、信噪比、对比度、对比噪声比、病变清晰度、细节可感知性以及对图像伪影的敏感性。FSE图像上脂肪的高信号强度导致FSE图像上病变与脂肪的对比度略低。然而，基于病变清晰度，FSE能够在肌肉骨骼MRI中取代耗时的传统T2加权SE成像。相比之下，GRE图像通常显示出更高的病变清晰度。在我们的研究中，FSE的一个小缺点是图像质量经常因模糊、黑带和波纹伪影而恶化。然而，其中一些伪影可以通过使用短回波链和/或短回波间隔来预防。
