QA of Treatment Delivery /Overlaid Digitized Port Films

放射治疗的质量保证(QA)与处方的一致性是一个持续关注的问题，无论是在当地还是在全国。ROB使用经纬网，将对准和尺寸信息直接投射到预期治疗区域的模拟胶片和所有相应的入射图像上。该项目是将来自数字化模拟器和端口胶片的图像、电子门户图像和来自CT数据的数字重建节段图像叠加在一起，以确定相对于目标和关键解剖结构的辐射场对准的准确性和重复性。数字化胶片现在已经成为每个患者病历的一部分。这一功能正在整合到新的记录和核查系统中。此外，我们还开发了软件，可以从任何成像方式获取胶片图像，并对它们进行旋转和缩放，以便可以立即进行比较。已经开发了额外的软件来交互地融合任何给定患者的CT和MRI图像数据，以准确地确定目标体积。目前的研究包括开发一种多模式植入式基准系统来提高患者的定位精度，这将导致图像配准精度的提高。Rob正在获取数字成像(DR)技术，并将在必要时对其进行调整，以用于获取海量门户图像。

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 patient's chart. This feature is being integrated into the new Record-and Verify system. Additionally, we have developed software to acquire 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 interactively fuse 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. ROB is acquiring digital imaging (DR) technology and will adapt it, as necessary, for megavoltage portal image acquisition.