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首页> 外文期刊>Radiotherapy and oncology: Journal of the European Society for Therapeutic Radiology and Oncology >Differences in abdominal organ movement between supine and prone positions measured using four-dimensional computed tomography.
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Differences in abdominal organ movement between supine and prone positions measured using four-dimensional computed tomography.

机译：仰卧位与俯卧位之间腹部器官运动的差异使用四维计算机断层扫描测量。

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BACKGROUND AND PURPOSE: To analyze the differences in intrafractional organ movement throughout the breathing cycles between the supine and prone positions using four-dimensional computed tomography (4D CT). MATERIALS AND METHODS: We performed 4D CT on nine volunteers in the supine and prone positions, with each examinee asked to breathe normally during scanning. The movement of abdominal organs in the cranio-caudal (CC), anterior-posterior (AP) and right-left (RL) directions was quantified by contouring on each phase between inspiration and expiration. RESULTS: The mean intrafractional motions of the hepatic dome, lower tip, pancreatic head and tail, both kidneys, spleen, and celiac axis in the supine/prone position were 17.3/13.0, 14.4/11.0, 12.8/8.9, 13.0/10.0, 14.3/12.1, 12.3/12.6, 11.7/12.6 and 2.2/1.8mm, respectively. Intrafractional movements of the liver dome and pancreatic head were reduced significantly in the prone position. The CC directional excursions were major determinants of the 3D displacements of the abdominal organs. Alteration from the supine to the prone position did not change the amount of intrafractional movements of kidneys, spleen, and celiac axis. CONCLUSION: There was a significant reduction in the movements of the liver and pancreas during the prone position, especially in the CC direction, suggesting possible advantage of radiotherapy to these organs in this position.
机译：背景与目的：使用二维计算机断层扫描（4D CT）分析整个呼吸周期中仰卧位与俯卧位之间的分数内器官运动的差异。材料与方法：我们对9位仰卧位和俯卧位志愿者进行了4D CT检查，每位被测者在扫描过程中均要求正常呼吸。通过在吸气和呼气之间的每个阶段绘制轮廓来量化腹腔器官在颅尾（CC），前后（AP）和左右（RL）方向上的运动。结果：仰卧位/俯卧位的肝穹顶，下尖端，胰头和尾，肾脏，脾脏和腹腔轴的平均分数运动分别为17.3 / 13.0、14.4 / 11.0、12.8 / 8.9、13.0 / 10.0， 14.3 / 12.1、12.3 / 12.6、11.7 / 12.6和2.2 / 1.8mm。俯卧位肝穹顶和胰头的分数内运动明显减少。 CC方向偏移是腹部器官3D位移的主要决定因素。从仰卧位到俯卧位的改变不会改变肾脏，脾脏和腹腔轴的分数内运动量。结论：俯卧位期间肝脏和胰腺的运动明显减少，尤其是在CC方向，这表明在该位置这些器官的放射治疗可能具有优势。

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