Analysis of 4D movement for various cancers using 320-row CT and research of synchronous irradiation

我们分析了食管癌、乳腺癌、胃癌、肺癌放疗时相同体位的20秒4D运动。在食管癌、胃癌和肺癌中，呼吸相关运动均随着靠近膈肌的病变而增大。在乳腺癌患者中，与呼吸相关的运动约为2毫米，比预期的要小得多。我能够展示有用的数据在放射治疗计划的内部边缘决定的情况下。这是IMRT（调强放疗）治疗方案成为未来放射治疗主流的一个特别重要的数据。

We analyzed the 4D movement during 20 seconds in the same position as during radiotherapy of esophageal cancer, breast cancer, gastric cancer, and lung cancer. In esophageal, gastric, and lung cancer, after all breathing-related movement was bigger as the lesion which was near to diaphragm. In breast cancer, the breathing-related movement was around 2mm much smaller than expectation. I was able to show useful data in case of the internal margin decision in radiotherapy planning. This is a particularly important data in the treatment plan of IMRT(intensity modulation radiation therapy) becoming mainstream of the future radiation therapy.