白志强,史洁,沈君.MRI增强T1高分辨力各同性容积激发序列与TSE T1W序列检出椎体转移瘤的对比分析[J].中国医学影像技术,2017,33(9):1397~1400 |
MRI增强T1高分辨力各同性容积激发序列与TSE T1W序列检出椎体转移瘤的对比分析 |
Comparative analysis of detection of spinal metastases with contrast-enhanced MRI T1 high resolution isotropic volume excitation and TSE T1WI sequence |
投稿时间:2016-12-27 修订日期:2017-07-05 |
DOI:10.13929/j.1003-3289.201612105 |
中文关键词: 椎体 肿瘤转移 磁共振成像 序列 |
英文关键词:Spine Neoplasm metastasis Magnetic resonance imaging Sequence |
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中文摘要: |
目的 比较增强MRI快速T1高分辨力各向同性容积激发(THRIVE)序列和TSE序列T1W检出椎体转移瘤的价值。方法 对31例经穿刺活检病理证实的椎体转移瘤患者行MR增强检查,增强后先后行常规矢状位TSE T1W序列和矢状位THRIVE序列扫描。比较2个序列显示转移瘤病灶的数目、SNR、CNR和病灶边缘清晰度、运动伪影评分。结果 TSE T1W序列和THRIVE序列扫描时间分别为2 min 55 s和33 s。增强后THRIVE序列显示病灶的数量与TSE T1W序列差异无统计学意义(Z=-0.816,P=0.414)。增强后THRIVE序列的SNR(432.54±271.60)、CNR(233.27±197.65)均低于TSE T1W序列的SNR(674.32±375.79)、CNR(312.38±207.49),差异均有统计学意义(t=-4.366、-2.660,P<0.001、0.012)。TSE T1W序列显示病灶边缘较THRIVE序列清晰(Z=-4.082,P<0.001),但运动伪影较THRIVE序列明显(Z=2.291,P=0.022)。结论 增强扫描THRIVE序列扫描时间短,运动伪影少,椎体转移瘤的检出数目与TSE T1WI序列相当,在椎体转移瘤的检查中取代TSE T1W序列具有可行性。 |
英文摘要: |
Objective To compare the usefulness of contrast-enhanced T1 high resolution isotropic volume excitation (THRIVE) sequence and fat-saturated TSE sequence in detection of spinal metastases. Methods Thirty-one consecutive patients with spinal metastases were recruited. All patients received post-contrast TSE T1WI followed by a fat-suppressed THRIVE sequence. The number of lesions, SNR and CNR for both sequences, and the scoring of image quality concerning motion-artifact and tumor conspicuity were compared. Results Acquisition time of the post-contrast TSE T1W sequence and the THRIVE sequence was 2 min 55 s and 33 s, respectively. No significant difference was found in the number of lesions detected between the two sequences (Z=-0.816, P=0.414). The SNR (432.54±271.60) and CNR (233.27±197.65) of the THRIVE sequence were significantly lower than the SNR (674.32±375.79) and CNR (312.38±207.49) of the TSE T1W sequence respectively (t=-4.366, -2.660, P<0.001, 0.012). Tumor conspicuity of the post-contrast TSE sequence was better than that of THRIVE sequence (Z=-4.082, P<0.001), while the motion-artifact in TSE sequence was more severe (Z=2.291, P=0.022). Conclusion The post-contrast THRIVE sequence is capable of decreasing acquisition time and motion-artifact. Besides, its detected efficacy is equal to that of TSE sequence. There is practical possibility to replace the conventional post-contrast TSE T1WI sequence with the THRIVE sequence in the imaging of spinal metastases. |
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