Takazakura Ryutaro, Takahashi Masashi, Nitta Norihisa, Murata Kiyoshi
Department of Radiology, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, Shiga, Japan.
J Magn Reson Imaging. 2004 May;19(5):605-9. doi: 10.1002/jmri.20051.
To determine the postural difference of diaphragmatic motion between the sitting and supine positions.
A total of 10 healthy men were examined using a vertically open 0.5-T magnetic resonance (MR) system. A total of 40 sequential MR images were obtained in both the sitting and supine positions during two to five respiratory cycles. The diaphragmatic excursions (DEs) were measured on three diaphragmatic points of six sagittal planes for both positions. The differences in DEs between the anterior and posterior parts of the diaphragm were also determined.
DEs in the supine position were significantly greater than those in the sitting position at 15 of the 18 points. In five of the six sagittal planes, the difference of DE between posterior and anterior points was significantly larger in the supine position than in the sitting position.
Diaphragmatic movement in the supine position is greater than that in the sitting position, especially in the posterior part of the diaphragm.
确定坐位与仰卧位时膈肌运动的姿势差异。
使用垂直开放式0.5-T磁共振（MR）系统对10名健康男性进行检查。在两到五个呼吸周期内，于坐位和仰卧位分别获取40幅连续的MR图像。在两个体位的六个矢状面上的三个膈肌点测量膈肌偏移（DEs）。还确定了膈肌前后部DEs的差异。
在18个点中的15个点处，仰卧位的DEs显著大于坐位。在六个矢状面中的五个中，仰卧位时后部与前部点之间的DE差异明显大于坐位。
仰卧位时的膈肌运动大于坐位，尤其是在膈肌的后部。
