COMPARISON OF BREATH-HOLD FAST SPIN-ECHO AND CONVENTIONAL SPIN-ECHO PULSE SEQUENCES FOR T2-WEIGHTED MR-IMAGING OF LIVER-LESIONS
COMPARISON OF BREATH-HOLD FAST SPIN-ECHO AND CONVENTIONAL SPIN-ECHO PULSE SEQUENCES FOR T2-WEIGHTED MR-IMAGING OF LIVER-LESIONS
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DOI：
10.1148/radiology.194.2.7824723
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发表时间：
1995-02-01
期刊：
影响因子：
19.7
通讯作者：
RIEDERER, SJ
中科院分区：
文献类型：
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作者：
RYDBERG, JN;LOMAS, DJ;RIEDERER, SJ
目的：评价一种屏气快速自旋回波(SE)技术在肝脏病变T2加权磁共振(MR)成像中的应用。材料和方法：开发一种快速自旋回波(SE)技术，每16秒屏气一次回波可成像6个切片。将所得图像与常规双回波T2加权SE序列的第一回波(18段16分55秒)获得的图像进行比较。对31例肝脏局灶性恶性病变患者进行前瞻性研究。结果：在定量上，54个具有代表性的病灶的快速SE图像的对比度和对比度噪声比分别比常规T2加权图像提高20%+/-5和19%+/-8。与常规T2加权SE图像相比，快速SE图像的伪影更少，病变大小更接近或更好，对肝外结构的显示也有很大改善。结论：屏气快速SE技术能在极大地缩短采集时间的情况下提供诊断有用的肝脏图像。
PURPOSE: To evaluate a breath-hold fast spin-echo (SE) technique for T2-weighted magnetic resonance (MR) imaging of liver lesions.MATERIALS AND METHODS: A fast SE technique was developed that enabled six sections to be imaged per 16-second breath hold with a single echo. Resulting images were compared with those obtained with the first echo of a conventional dual-echo T2-weighted SE sequence (16 minutes 55 seconds for 18 sections). Thirty-one patients with malignant focal hepatic lesions were studied prospectively. The images were compared quantitatively and qualitatively.RESULTS: Quantitatively, the contrast and contrast-to-noise ratios for the fast SE images were 20% +/- 5 and 19% +/- 8 greater, respectively, than those for the conventional T2-weighted SE images of the 54 representative lesions. Qualitatively, fast SE images had less image artifact, enabled comparable or better lesion sizing, and greatly improved depiction of extrahepatic structures compared with conventional T2-weighted SE images.CONCLUSION: The fast SE technique with breath holding provides diagnostically useful liver images in a greatly decreased acquisition time.