Department of Internal Medicine, Division of Gastroenterology and Hepatology, Maastricht University Medical Center, Maastricht, The Netherlands.
J Magn Reson Imaging. 2011 Sep;34(3):685-90. doi: 10.1002/jmri.22619. Epub 2011 Jul 12.
To determine the accuracy of magnetic resonance imaging (MRI) volume scans: 1) to measure known meal volumes in vitro, and 2) to compare volume changes in response to a meal measured with the barostat with those measured with MRI in vivo.
Polyethylene bags were filled with known volumes and MRI volume scans were performed to determine the accuracy of the volume measurements. Barostat measurements and MRI volume scans were performed simultaneously in 14 healthy subjects before and up to 90 minutes after ingestion of a liquid meal.
In vitro MRI-determined volumes showed an excellent linear relationship (r = 0.995, P < 0.001) with actual meal volumes. Although fasting gastric volume, postprandial gastric volume, and relaxation volume measured with MRI were significantly larger compared to volumes measured with the barostat, volumes determined with both techniques showed excellent correlation.
Volumes in the range of postprandial meal volumes are accurately measured with MRI. MRI is a noninvasive technique to measure stomach volumes and volume changes in response to a meal. Volume changes in response to a meal measured with MRI correlate perfectly with those measured with the barostat device.
确定磁共振成像（MRI）容积扫描的准确性：1）测量体外已知餐量，2）比较胃内体积计和 MRI 测量的餐后体积变化。
用聚乙烯袋装满已知体积，并进行 MRI 容积扫描，以确定体积测量的准确性。在 14 名健康受试者中，在摄入液体餐后，同时进行胃内压力计测量和 MRI 容积扫描，时间长达 90 分钟。
体外 MRI 测定的体积与实际餐量呈极好的线性关系（r = 0.995，P < 0.001）。尽管 MRI 测量的空腹胃体积、餐后胃体积和松弛体积明显大于胃内压力计测量的体积，但两种技术测量的体积具有极好的相关性。
MRI 可准确测量餐后餐量范围内的体积。MRI 是一种非侵入性技术，可测量胃体积和餐后体积变化。MRI 测量的餐后体积变化与胃内压力计装置测量的体积变化完全相关。
