Assessment of Small Bowel Motility Function With Cine-MRI Using Balanced Steady-State Free Precession Sequence
Assessment of Small Bowel Motility Function With Cine-MRI Using Balanced Steady-State Free Precession Sequence
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DOI：
10.1002/jmri.22529
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发表时间：
2011-05-01
影响因子：
4.4
通讯作者：
Murata, Kiyoshi
中科院分区：
文献类型：
--
作者：
Wakamiya, Makoto;Furukawa, Akira;Murata, Kiyoshi
目的：评价稳态自由旋进序列电影磁共振成像（MRI）在监测和评估小肠运动中的应用。材料和方法：在0、15、30、45、50、60、70、80、90、95、96、98、99、9口服1500 mL不可吸收液体后60分钟监测小肠收缩。使用线索模式显示，小肠收缩进行了审查，并在每个图像上测量管腔直径，以获得频率和振幅的肠contractions.Results：口服制剂耐受性良好，无重大并发症。Cine-MRI提供了高颞叶。空间的以及用于监测肠收缩的对比度分辨率。肠收缩频率和幅度的平均值及标准差分别为6.0 +/- 2.98/min和10.4 +/- 4.53 mm，空肠袢为5.1 +/- 3.38/min和9.59 +/- 5.57 mm，回肠袢为6.9 +/- 2 22/min和11.2 +/- 3.06 mm。结论：Cine-MRI能提供足够的动态图像来观察小肠的收缩。肠口径的测量允许计算收缩的幅度和频率，用于表征和定量评估小肠运动功能。
Purpose: To evaluate the use of cine-magnetic resonance imaging (MRI) with a steady-state free precession sequence to monitor and assess small bowel motility.Materials and Methods: Sequential MRI, using a balanced steady-state free precession sequence, was performed in eight healthy male volunteers at 0, 15, 30, 45, and 60 minutes after oral administration of 1500 mL of nonabsorbable fluid to monitor small bowel contractions. Using the clue-mode display, small bowel contractions were reviewed and the luminal diameter was measured on each image to obtain frequency and amplitude of bowel contractions.Results: The oral preparation was well tolerated without major complications. Cine-MRI provided high temporal. spatial. and contrast resolution for monitoring bowel contractions. Mean values with standard deviations of frequency and amplitude of bowel contractions were 6.0 +/- 2.98/min and 10.4 +/- 4.53 mm, respectively, and were 5.1 +/- 3.38/min and 9.59 +/- 5.57 mm at the jejunal loops and 6.9 +/- 2 22/min and 11.2 +/- 3.06 mm at the ileal loops. With the passage of luminal fluid, frequency of bowel contractions decreased and the bowels tended to pause their contractions.Conclusion: Cine-MRI provides sufficient dynamic images to observe small bowel contractions. Measurement of bowel caliber permits calculation of amplitude and frequency of the contractions for characterization and quantitative assessment of small bowel motility function.