计算机辅助照射野验证软件的设计与开发

PIV: A Computer-aided Portal Image Verification System

照射野验证 ( PIV)是实施精确放射治疗质量保证 ( QA)的关键步骤之一 ,为了定量分析摆位误差 ,提高照射野验证的准确性和可视性 ,在 Windows95操作系统平台上 ,采用 C+ +编程技术 ,设计开发了 PIV应用软件。PIV软件通过提供图像处理工具、多种融合显示方式可以有效提高照射野验证的可视性 ,半自动的照射野影像登记算法能够提高定性验证的准确性 ,对于规则照射野可以给出精度较高的定量分析结果。它具有分析处理的手段多、灵活、分辨率高的特点 。

Portal image verification (PIV) is one of the key actions in QA procedure for sophisticated accurate radiotherapy. The purpose of this study was to develop a PIV software as a tool for improving the accuracy and visualization of portal field verification and computing field placement errors. PIV was developed in the visual C++ integrated environment under Windows 95 operating system. It can improve visualization by providing tools for image processing and multimode images display. Semi-automatic register methods make verification more accurate than view-box method. It can provide useful quantitative errors for regular fields. PIV is flexible and accurate. It is an effective tool for portal field verification.