CAJ | 학술논문

对肺部肿瘤运动的间接检测是肺癌动态放疗中亟待解决的一个重要问题,其关键是建立患者呼吸或胸腹部运动与肺部组织运动之间的关系模型. 针对该问题,以同步采集的患者呼吸信号和肺部X线透视图像作为研究对象,对患者的呼吸及其引起的肺部组织运动之间的关系进行了研究. 使用压力变化呼吸检测装置采集患者的呼吸信号,采用光流法对X线透视图像序列中的横膈膜运动进行自动跟踪,在此基础上对比分析了呼吸信号和横膈膜运动的波形. 结果表明,患者的呼吸与其引起的肺部组织运动之间存在一定的相位偏差. 在进行相位对齐后,呼吸与肺部组织运动之间呈一定的线性关系.
대폐부종류운동적간접검측시폐암동태방료중극대해결적일개중요문제,기관건시건립환자호흡혹흉복부운동여폐부조직운동지간적관계모형. 침대해문제,이동보채집적환자호흡신호화폐부X선투시도상작위연구대상,대환자적호흡급기인기적폐부조직운동지간적관계진행료연구. 사용압력변화호흡검측장치채집환자적호흡신호,채용광류법대X선투시도상서렬중적횡격막운동진행자동근종,재차기출상대비분석료호흡신호화횡격막운동적파형. 결과표명,환자적호흡여기인기적폐부조직운동지간존재일정적상위편차. 재진행상위대제후,호흡여폐부조직운동지간정일정적선성관계.
It is an important problem in dynamic radiotherapy for lung cancer, which has not been solved, to detect the lung tumor' s motion indirectly. The key of this problem is to create a relationship model between the patient' s breathing or the motion of thorax and abdomen with the lung organ' s motion. Considering this problem, the patient' s respiratory signal and fluoroscopic images of the lung are adopted as research object to study the relationship between the patient' s breathing and the lung organ' s motion caused by breathing. The patient' s respiratory signal was acquired by a respiratory detecting device based on pressure detecting, and the optical flow method was adopted to track the motion of the diaphragm in the fluoroscopic image sequence, and the waveforms of the diaphragm' s motion and the respiratory signal were compared. Experimental results show that there is a phase discrepancy between the patient' s breathing and the lung organ' s motion caused by breathing. After phase aligning, a linear relationship can be found between breathing and the lung organ' s motion.