RADIATION FIELD MODELING AND COMPUTERIZED TREATMENT PLANNING

医学成像和定位技术的巨大进步 近年来给物理和计算机带来了挑战 扩展计算机化治疗计划能力的技术 和优化。 一种新的使用卷积核的光子束模型 实验数据已作为TPS的替代方案进行了推导和添加 用于对照基于NFD的较旧模型进行评估。数量 电子束模型中的综合扇区从16个增加到 到128，极大地提高了不规则野剂量的准确性 分配。 已经设计了一套全面的测试来提供质量保证 新版本的TPS。新版本有能力允许 除标准图像外，还可使用更大的图像(640 X 640) 图像。添加了一组控件，以方便3D、非共面 通过交互控制龙门、准直器和底座进行规划。 同时即时更新3D光束的患者和所有人的眼部视图 勾勒的结构。反映组织存在的能力 在剂量分布中增加了补偿器。关于如何处理 使用实验性卷积核的阻挡光子场也 已添加。在多层次图像和剂量之间移动的能力 分布以及非轴向视图(梁眼、矢状面、冠状面) 使用键盘命令极大地提高了键盘的临床实用性 程序。 计划在今年年底发布的下一个版本将包含 执行比较治疗计划的能力，将以标准为特色 512 x 512主窗口，具有较小的辅助窗口。主图像可以 平移和缩放，以准确勾勒出小结构的轮廓。这个 此外，还将增加添加额外“下降”波束数据集的能力。 还将使用一套工具介绍协调的CT-MRI计划 缩放和配准图像并将结果输出到标准TPS中 格式化。TPS的最终临床版本计划在6月份发布， 1997，并将结合具有不均匀性的电子束算法 来进行近距离放射治疗计算 AAPM TG-43形式主义。将TPS的发展作为一项主要研究 Rob的努力也将结束，这样研究就可以集中在 其他领域。

The vast improvements of the medical imaging and localization technology over recent years has brought a challenge to physics and computer technology to extend the capabilities of computerized treatment planning and optimization. A new photon beam model using a convolution kernel derived from experimental data has been derived and added as an alternative to the TPS for evaluation against the older NFD-based model. The number of integrated sectors in the electron beam model has been increased from 16 to 128, considerably improving the accuracy of irregular field dose distributions. A comprehensive set of tests has been devised to provide quality assurance of new versions of the TPS. The new version has the ability to permit working with a larger image (640 x 640) in addition to the standard images. A set of controls has been added to facilitate 3D, non-coplaner planning by interactively controlling gantry, collimator and pedestal. while instantaneously updating a 3D beam's eye view of the patient and all outlined structures. The ability to reflect the presence of tissue compensators in the dose distribution has been added. The handling of blocked photon fields using an experimental convolution kernel has also been added. The ability to move between multi-level images and dose distributions, as well as non-axial views (beams' eye, sagittal, coronal) using keyboard commands has greatly improved the clinical utility of the program. The next release, scheduled for the end of the year, will incorporate the ability to perform comparative treatment planning, will feature a standard 512 x 512 main window, with smaller secondary windows. The main image can be panned and zoomed for accurate outlining of small structures. The ability to add additional "drop" beam datasets will also be added. Coordinated CT-MRI planning will also be introduced using a set of tools to scale and register images and output the results in the standard TPS format. The final clinical version of the TPS is scheduled for June, 1997, and will incorporate an electron beam algorithm with inhomogeneity correction and the ability to perform brachytherapy calculations using the AAPM TG-43 formalism. The development of the TPS as a major research effort of ROB will also conclude, so that research can concentrate on other areas.