Onozawa Shiro, Murata Satoru, Kimura Takayoshi, Ueda Tatsuo, Sugihara Fumie, Yasui Daisuke, Tajima Hiroyuki
Department of Radiology/Center for Advanced Medical Technology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113-8603, Japan.
Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, Japan.
Jpn J Radiol. 2016 Nov;34(11):724-729. doi: 10.1007/s11604-016-0579-6. Epub 2016 Sep 9.
To investigate how elevation of the arms affects diaphragm height.
We retrospectively reviewed angiography and computed tomography (CT) portography data from 44 patients who were treated for hepatocellular carcinoma at our institution from July 2013 to May 2014. Diaphragm height was determined independently by two radiologists as the distance from the upper edge of the first lumbar vertebra to the highest point of the right diaphragm. The differences in height between angiography and CT images were compared using a paired t-test. We also evaluated the influence of table height and distance between X-ray tube and flat panel detector [source-image distance (SID)] on a phantom model.
Diaphragm height was higher on CT images [mean ± standard deviation (SD), 113.2 ± 27.2 mm] than on angiography images (105.5 ± 27.8 mm; P < 0.001). Inter-rater correlation was excellent both in angiography (R = 0.920; P < 0.001) and CT (R = 0.950; P < 0.001) measurements. Table height and SID had no influence on diaphragm height measurements (P = 0.33).
The diaphragm elevation was observed on CT with arm elevation compared with angiography without arm elevation.
研究手臂抬高如何影响膈肌高度。
我们回顾性分析了2013年7月至2014年5月在我院接受肝细胞癌治疗的44例患者的血管造影和计算机断层扫描（CT）门静脉造影数据。两名放射科医生独立测定膈肌高度，即从第一腰椎上缘到右膈肌最高点的距离。使用配对t检验比较血管造影和CT图像之间的高度差异。我们还在体模模型上评估了检查台高度和X射线管与平板探测器之间的距离[源-图像距离（SID）]的影响。
CT图像上的膈肌高度[平均值±标准差（SD），113.2±27.2mm]高于血管造影图像（105.5±27.8mm；P<0.001）。血管造影（R=0.920；P<0.001）和CT（R=0.950；P<0.001）测量的评分者间相关性均极佳。检查台高度和SID对膈肌高度测量无影响（P=0.33）。
与未抬高手臂的血管造影相比，抬高手臂的CT检查观察到膈肌抬高。
