Improved Arterial Visibility Using Short-Tau Inversion-Recovery (STIR) Fat Suppression in Non-Contrast-Enhanced Time-Spatial Labeling Inversion Pulse (Time-SLIP) Renal MR Angiography (MRA)
Improved Arterial Visibility Using Short-Tau Inversion-Recovery (STIR) Fat Suppression in Non-Contrast-Enhanced Time-Spatial Labeling Inversion Pulse (Time-SLIP) Renal MR Angiography (MRA)
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DOI：
10.1002/jmri.21792
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发表时间：
2009-06-01
影响因子：
4.4
通讯作者：
Yui, Masao
中科院分区：
文献类型：
--
作者：
Shonai, Takaharu;Takahashi, Tadashi;Yui, Masao
目的：评价短tau反转恢复(STIR)脂肪抑制在非对比增强呼吸触发自由呼吸时间-空间标记反转脉冲(时移)肾磁共振血管成像(MRA)中的应用价值。选择性脂肪抑制。材料和方法：对空间选择性反转恢复(SSIR)脉冲的反转时间(TI)和呼吸频率进行了模拟分析，并在体模和人体中使用1.5T东芝扫描仪上的三维相干稳态自由进动(SSFP)序列进行了验证。结果：搅拌脂肪抑制成功地抑制了来自肠道和实质器官的信号，并提供了更好的动脉和背景对比，尽管当患者呼吸极其缓慢时，SSIR脉冲需要延长TI。结论：搅拌脂肪抑制可以提供更好的肾动脉对比。在非对比剂自由呼吸时间滑脱MRA中，比国际象棋脂肪抑制更有效；由于缺乏肠道信号的干扰，它也是肾动脉狭窄的有效筛查工具。然而，如果患者呼吸缓慢，则需要密切关注。随着ssIR脉冲的TI降低，STIR方法需要更快节奏的呼吸。
Purpose: To evaluate whether short-tau inversion-recovery (STIR) fat suppression is worthwhile in non-contrast-enhanced respiration-triggered free-breathing time-spatial labeling inversion pulse (Time-SLIP) renal magnetic resonance angiography (MRA) compared with chemical shift. selective (CHESS) fat Suppression.Materials and Methods: Simulation-based analyses of inversion time (TI) for spatial-selective inversion-recovery (ssIR) pulse and breathing rate were performed, and confirmed on a phantom and in human subjects using a three-dimensional (3D) coherent steady-state free precession (SSFP) sequence on a 1.5T Toshiba scanner.Results: The STIR fat suppression successfully suppressed signals from the intestines and parenchymous organs and provided better contrast between the arteries and the background, although an extension of TI was required for the ssIR pulse when a patient's respiration was extremely slow.Conclusion: STIR fat suppression provides better renal artery contrast. than CHESS fat suppression in non-contrast free-breathing Time-SLIP MRA; it is also an effective screening tool for renal artery stenosis because of the lack of interference from intestinal signals. However, close attention is needed if the patient has slow respiration. As the TI for the ssIR pulse decreases, the STIR method requires faster-paced respiration.