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随着放射治疗设备的发展和更新,模拟定位机已成为放射治疗的重要辅助工具,但如果定位机的准确性较差,导致定位错误,会带来严重的后果。因此机器安装后必须定期校对,时间最好每周一次或根据使用量决定。 一、模拟定位机常规校正内容 模拟定位机需要常规校对的几个方面包括: 准直器(光阑装置)中心是否与X线束中心轴重合; 等中心位置是否准确; 模拟灯光应与X线照射野重合; 数字显示系统所指示的数值应与实际情况一致。 模拟定位机要求X线管焦点必须对正管套的射出窗口,射线中心轴垂直于机器的旋转轴,这两项
With the development and updating of radiotherapy equipment, the analogue positioning machine has become an important auxiliary tool for radiotherapy. However, if the accuracy of the positioning machine is poor, the positioning error will be caused with serious consequences. Therefore, the machine must be regularly calibrated after installation, the best time once a week or according to the amount of use. First, the analog positioner routine correction content Analog positioning machine requires routine proofreading several aspects include: collimator (diaphragm device) center coincides with the center axis of the X-ray beam coincidence; is the center position is accurate; analog light should be X-ray irradiation Wild coincidence; numerical display system indicates the value should be consistent with the actual situation. Analog positioning machine requirements X-ray tube center must focus on the injection window, the central axis of the ray perpendicular to the axis of rotation of the machine, these two