| 吴婉莎,任克,尚建南.MR无对比剂肾动脉血管成像的参数优化及其与年龄的关系[J].中国医学影像技术,2017,33(7):1041~1046 |
| MR无对比剂肾动脉血管成像的参数优化及其与年龄的关系 |
| Parameter optimization for non-contrast-enhanced renalMR angiography and its relationship with age |
| 投稿时间：2016-10-31 修订日期：2017-03-27 |
| DOI：10.13929/j.1003-3289.201610149 |
| 中文关键词: 肾动脉狭窄 磁共振成像 血管造影术 反转时间 年龄 |
| 英文关键词:Renal artery stenosis Magnetic resonance imaging Angiography Inversion time Age |
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| 中文摘要: |
| 目的 探讨利用时间—空间双重标记翻转恢复（Time-SLIP）技术进行MR无对比剂肾动脉血管成像的可行性，得出最佳反转时间（TI）值，并分析其与年龄的关系。方法 将61名健康志愿者按年龄分为22~50岁组（n=32）及51~80岁组（n=29），分别于6个不同TI值（1 200、1 300、1 400、1 500、1 600、1 700 ms）水平下行MR扫描。分别测量及分析肾血管—肾实质信号强度比（VKR）、肾动脉分支显示评分及肾动脉图像质量评分。结果 左侧及右侧肾的VKR值均在TI值为1 500 ms时最高。肾动脉分支显示评分在TI值为1 200~1 400 ms水平逐渐上升，之后趋于平缓。全部受试者中，TI值为1 500 ms时图像质量评分最高；22~50岁组中，TI值为1 500 ms时肾动脉图像质量评分最高；51~80岁组中，TI值为1 600 ms时肾动脉图像质量评分最高。22~50岁组各部分肾动脉图像质量评分均高于51~80岁组（P均<0.05）。结论 利用Time-SLIP技术可在不使用对比剂的情况下完成MR肾动脉成像，最佳TI值为1 500 ms。年龄是影响TI值选择的重要因素之一。 |
| 英文摘要: |
| Objective To investigate the feasibility of non-contrast-enhanced renal MR angiography (NCE-MRA) using time spatial labeling inversion pulse (Time-SLIP) technique, and to discuss the optimized inversion time (TI) and its relationship with age. Methods A total of 61 healthy volunteers were divided into two groups by age, 22—50 years (n=32) and 51—80 years (n=29). All volunteers underwent 3.0T MRI examination with 6 different TIs sequences (1 200, 1 300, 1 400, 1 500, 1 600, 1 700 ms). The vessel-to-kidney signal ratio (VKR), grade of renal artery branches, grade of renal artery imaging quality were measured and analyzed. Results The VKR values were the highest at TI=1 500 ms in both sides of kidneys. The scores of renal artery branches were gradually rising up but tending to be steady higher than 1 400 ms. Among all the subjects, the highest score of renal artery imaging quality was at TI=1 500 ms. In 22—50 years group, the highest score of renal artery imaging quality was at TI=1 500 ms. Meanwhile, the highest score was found at TI=1 600 ms in 51—80 years group. Moreover, the grade of renal artery imaging in the 22—50 years group acquired better scores compared to the 51—80 years group (all P<0.05). Conclusion Time-SLIP technique is helpful to obtain renal MRA without contrast medium. The optimized TI value is 1 500 ms. Moreover, age can affect the optimized TI value. |
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