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Development of a new respiratory monitoring device for stereotactic body irradiation using a cyberknife

开发一种新型呼吸监测装置，用于使用射波刀进行立体定向身体照射

基本信息

批准号：
15591284
负责人：
NAKAMURA Katsumasa
金额：
$ 2.24万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15591284/
关键词：
Cyberknife respiratory monitoring radiotherapy stereitactic body irradiation

项目摘要

Voluntary breath hold technique is a simple method to control the respiration-related motion of the tumor during irradiation.In 2003, we have developed a new respiratory monitoring device for stereotactic body irradiation using both a cyberknife and linac machine. The system consists of a small laser pointer on the abdominal wall and an overhead board (see figure). A laser beam projected on the board above a patient's face moves according to the respiratory cycle, and correlates well with the motion of the chest wall. Patients can control the motion of the chest wall because they can recognize the motion of the laser beam on the board. A therapist can monitor the motion of the laser beam on the board through a room camera.Five normal volunteers were tested. A machine vision system (XV-1000, KEYENCE, Japan) was used to evaluate the chest and abdominal wall position in five sessions of 15-second deep-inspiration breath hold (DIBH) with or without thisdevice. Four male and one female heal … More thy volunteers with a median age of 26 years (range : 25-32 years) were involved in this study. The change in the position of the chest and abdominal wall with or without this device during 5 repetitions of 15-second breath-holding (BH) was measured at 80 msec intervals under 3 respiration BH types : shallow expiration BH, shallow inspiration BH, and deep inspiration BH.Using voluntary BH technique without any monitoring devices,1)the deviation of the wall position is smallest in shallow expiration BH.2)shallow inspiration BH and deep inspiration BH may not be suitable for radiotherapy, because the deviation of the wall position is large.Using voluntary BH technique with a monitoring device which displays the wall position to the patient,1)the deviation of the wall position is small enough in shallow expiration BH and shallow inspiration BH.2)the deviation is still large in deep inspiration BH.Patients may perform breath-hold maneuver in a highly reproducible fashion using a new respiratory monitoring device, particularly in shallow expiration BH and shallow inspiration BH. Less

自主屏气技术是一种简单的方法来控制放射治疗过程中与呼吸相关的肿瘤运动。2003年，我们开发了一种新的呼吸监测装置，用于立体定向体部照射，使用射波刀和直线加速器机。该系统由一个位于腹壁上的小型激光指示器和一个头顶板组成（见图）。投射在患者面部上方的板上的激光束根据呼吸周期移动，并且与胸壁的运动很好地相关。患者可以控制胸壁的运动，因为他们可以识别板上激光束的运动。治疗师可以通过室内摄像机监控激光束在板上的运动。使用机器视觉系统（XV-1000，KEYENCE，日本）在5次15秒深吸气屏气（DIBH）中使用或不使用该装置来评估胸壁和腹壁位置。四男一女治愈 ...更多信息志愿者的中位年龄为26岁（范围：25-32岁）。在3种呼吸BH类型下，以80 msec间隔测量5次15秒屏气（BH）重复期间（有或无该器械）胸壁和腹壁位置的变化：浅呼气BH、浅吸气BH和深吸气BH。采用无任何监测设备的自主BH技术，1）浅呼气BH时壁位置偏差最小。2）浅吸气BH和深吸气BH可能不适合放射治疗，由于室壁位置的偏差较大，采用自主BH技术，通过监测装置向患者显示室壁位置，1）在浅呼气BH和浅吸气BH中，壁位置的偏差足够小。2）在深吸气BH中，壁位置的偏差仍然很大。使用新的呼吸监测装置，患者可以以高度可重复的方式进行屏气动作，特别是在浅呼气BH和浅吸气BH中。少