CLINICAL RADIATION PHYSICS SERVICE

该科继续提供专家实物和技术支助。 对于放射治疗，包括常规校准、质量 保证和一线维护所有辐射生产和维护 辅助设备。它包括特殊剂量学研究，计算机- 辅助治疗计划和特殊治疗方案的设计和开发 为发展临床需求量身定做的设备。 目前的研究方向是准确地测量剂量 分配给接受TBI进行骨髓移植的患者和 提高剂量均匀度。现在根据点二极管计算剂量 使用一种新开发的算法进行测量。剂量均匀度是 通过在头部和颈部使用缺失的组织补偿器来实现最大化 区域。将新的患者轮廓与数据库中的 现有的补偿器，以实现精确匹配。因此，新的补偿器 仅在必要时制造，并添加到现有库中。 接下来将进行研究，以提高患者的准确性 双臂抬起并支撑在设计用于 将剂量调节到预期值。然后，这种支持将公开 这样就可以使用适当的屏蔽块。 与海军研究中心合作的一个项目也在启动 实验室评估半导体掺杂Vycor的临床应用 玻璃作为氟化锂(LiF)的热释光替代物 光子和电子束的剂量学。该项目随后将扩展到 基于Vycor玻璃剂量计的多光纤剂量计读取器的研制 到光纤。该系统的优点是提供 间歇性剂量和剂量率读数，应在 临床、辐射防护和环境远程剂量测量。

The section continues to provide expert physical and technological support for radiation treatment, consisting of routine calibration, quality assurance and first-line maintenance of all radiation producing and ancillary equipment. It includes special dosimetry studies, computer- assisted treatment planning and the design and development of special equipment tailored to developing clinical needs. Current research has been directed towards accurately measuring the dose distribution to patients receiving TBI for bone marrow transplant and to improving dose uniformity. Doses are now calculated based on point diode measurements using a newly developed algorithm. Dose uniformity is maximized by employing missing tissue compensators in the head and neck region. New patient contour profiles are checked against a library of existing compensators for an accurate match. New compensators are thus only manufactured when necessary and are added to the existing library. Research will next be conducted to improve the accuracy of patient positioning with the arms elevated and supported on a rest designed to modulate the dose to the expected value. This support will then expose the lungs so that appropriate shielding blocks can be used. A project is also starting in collaboration with the Naval Research Laboratory to evaluate the clinical utility of semiconductor doped Vycor glass as a substitute for Lithium Fluoride (LiF) in thermoluminescence dosimetry of photon and electron beams. This project will then expand to develop a multi-fiber dosimeter reader using Vycor glass dosimeters bonded to optical fibers. This system has the advantage of providing intermittent dose and dose-rate readings and should have applications in clinical, radiation protection and environmental remote dosimetry.