QA OF TREATMENT DELIVERY BY MEANS OF OVERLAID DIGITIZED SIMULATOR PORT FILMS

放射治疗提供与处方一致性的质量保证（QA）是地方和国家持续关注的问题。ROB采用分划板，将对准和尺寸信息直接投射到预期治疗野的模拟器胶片和所有相应射野图像上。本项目旨在叠加来自数字化模拟器和端口片的图像、电子射野图像和来自CT数据的数字重建节段图像，以确定辐射场对准靶和关键解剖结构的准确性和可重复性。数字化的电影现在包括作为每个病人的一部分的图表。安装后，该功能将与新的记录和验证系统完全集成。此外，我们还开发了软件，可以从任何成像方式获取图像、胶片图像，并旋转和缩放它们，以便可以立即进行比较。已经开发了额外的软件来结合任何给定患者的联合收割机CT和MRI图像数据，以准确地确定目标体积。目前的研究涉及一种多模态植入式基准系统的开发，用于提高患者定位精度，这将导致提高图像配准精度。将进行研究，以确定目前在放射科使用的商业数字成像荧光板作为湿胶片乳剂替代品的可行性。

The quality assurance (QA) of the consistency of radiation treatment delivery with the prescription is a continual concern, locally as well as nationally. The ROB employs graticules, projecting alignment and size information directly on both simulator films of the intended treatment fields and all corresponding portal images. This project is to overlay images from digitized simulator and port films, electronic portal images and digitally reconstructed segmental images from CT data in order to determine the accuracy and repeatability of radiation field alignment with respect to the target and critical anatomical structures. Digitized films are now included as part of every patients chart. This feature will be fully integrated with the new Record-and Verify system when it is installed. Additionally we have developed software to acquire images film images from any imaging modality and to rotate and scale them so that they can be available for immediate comparison. Additional software has been developed to combine CT and MRI image data of any given patient to accurately determine target volumes. Current research involves the development of a multimodality implantable fiducial system for improving patient positioning accuracy, which will result in improved image registration accuracy. Research will be conducted to determine the feasibility of the commercial digital imaging phosphor plates currently used in the Radiology Department as a substitute for wet film emulsions.