Maitz A H, Wu A, Lunsford L D, Flickinger J C, Kondziolka D, Bloomer W D
Department of Radiation Oncology, University of Pittsburgh Medical Center, PA 15213, USA.
Int J Radiat Oncol Biol Phys. 1995 Jul 30;32(5):1465-71. doi: 10.1016/0360-3016(95)00577-L.
This quality assurance program is designed for stereotactic radiosurgical units, gamma knife, to check and maintain the unit to preclude accidents and comply with current regulations.
Over 58 stereotactic radiosurgical units using 201 focused 60Co beams have been installed in the last 7 years and are in use at hospitals throughout the world, with at least 11 additional units being prepared to come on-line in the next year. This system has been in use at the University of Pittsburgh Medical Center (UPMC) for 7 years. A comprehensive quality assurance program has been developed. It includes the physics and dosimetry parameters and safety checks required by regulatory agencies. The program, based on over 7 years of experience in measurements, and used during the treatment of over 1500 patients, is separated into three aspects, namely physics, dosimetry, and safety. The UPMC program hopefully will indicate out-of-tolerance problems. Some quality assurance items are checked on a daily basis prior to patient treatment, while other aspects are checked on a weekly, monthly, and/or annual basis. A complete list of items with their respective time tables and tolerances is provided.
Although experience shows very small margins of error, larger values were chosen to account for variations in equipment and techniques.
Items included in this quality assurance program should indicate and/or preclude problems encountered in the use of this unit.
本质量保证程序专为立体定向放射外科设备——伽马刀设计，用于检查和维护该设备，以预防事故并符合现行规定。
在过去7年中，已安装了58台以上使用201束聚焦钴-60射线的立体定向放射外科设备，这些设备在世界各地的医院投入使用，预计明年至少还有11台设备将上线。该系统已在匹兹堡大学医学中心（UPMC）使用了7年。现已制定了一项全面的质量保证计划。它包括监管机构要求的物理和剂量学参数以及安全检查。该计划基于7年多的测量经验，并在1500多名患者的治疗过程中使用，分为物理、剂量学和安全三个方面。UPMC的计划有望指出超出公差的问题。一些质量保证项目在患者治疗前每天检查，而其他方面则每周、每月和/或每年检查一次。提供了一份完整的项目清单，包括各自的时间表和公差。
尽管经验表明误差幅度非常小，但为了考虑设备和技术的差异，还是选择了较大的值。
本质量保证计划中包含的项目应能指出和/或预防该设备使用中遇到的问题。
