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首页> 外文期刊>Radiology >Diaphragmatic motion: fast gradient-recalled-echo MR imaging in healthy subjects.
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Diaphragmatic motion: fast gradient-recalled-echo MR imaging in healthy subjects.

机译：肌运动：在健康受试者中进行快速梯度回波MR成像。

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PURPOSE: To investigate the feasibility of imaging diaphragmatic motion with a fast gradient-recalled-echo (GRE) magnetic resonance (MR) pulse sequence. MATERIALS AND METHODS: Fast GRE pulse sequences in sagittal and coronal planes were used to acquire repeated, single-level, 1.2-second scans in 10 healthy volunteers during deliberately slowed, approximate-vital-capacity breathing. Motion was analyzed subjectively by viewing the image sequences as cine loops and quantitatively by measuring the displacement of different points on the diaphragm at a workstation. RESULTS: Temporal and spatial resolutions were adequate in all subjects. Absolute excursion of the domes was 4.4 cm on the right and 4.2 cm on the left. Analysis of diaphragmatic displacement at different locations revealed a gradient of excursion that increased from anterior to middle to posterior (P < .05-.001; paired t test). Excursion of the lateral aspects was greater than that of the medial aspect (P < .001). CONCLUSION: Fast GRE MR imagingcan be reliably used to demonstrate diaphragmatic motion and may prove useful in the investigation of normal and abnormal respiratory mechanics.
机译：目的：探讨用快速梯度回波（GRE）磁共振（MR）脉冲序列成像diaphragm肌运动的可行性。材料与方法：在有意减慢的近似肺活量的呼吸过程中，使用矢状面和冠状面的快速GRE脉冲序列对10名健康志愿者进行了重复的单级1.2秒扫描。通过将图像序列视为电影循环来主观分析运动，并通过在工作站上测量振动膜上不同点的位移来进行定量分析。结果：所有受试者的时空分辨率均足够。圆顶的绝对偏移为右侧4.4厘米，左侧4.2厘米。对不同位置的diaphragm肌位移的分析显示，偏移的梯度从前到中到后增加（P <.05-.001;成对t检验）。外侧面的偏移大于内侧面的偏移（P <.001）。结论：快速GRE MR成像可可靠地用于显示diaphragm肌运动，并可能对研究正常和异常呼吸力学有用。

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