Radiation Field Modeling and Computerized Treatment Plan

已经开发了基于三维体素体积的融合算法，并通过融合MRI-T1、MRI-T2、PET和CT图像的成对组合来测试灵敏度和准确度。结果已经公布。已经进行了由四个并发融合图像集组成的数据集的比较。本文完成了透明技术同步信息显示的研究，沿着进行了前向传播误差分析，并在Linux和Windows环境下实现了基于EGS-4的蒙特卡罗剂量计算引擎（DCE）。在Windows环境下，DCE已集成到一个功能齐全的治疗计划系统中。现在的工作集中在相空间源模型的发展。每个相空间模型的确定需要大量的计算能力，我们正在以允许使用并行处理的方式移植代码，希望将测试模型参数所需的计算时间从3-4周减少到1天以下。

A fusion algorithm based on 3-dimensional voxel volumes has been developed and tested for sensitivity and accuracy by fusing paired combinations of MRI-T1, MRI-T2, PET and CT images. The results have been published. A comparison of data sets comprised of four concurrent fused image sets has been performed. A study of simultaneous information display using transparency techniques has been competed, along with forward propagation error analysis.The EGS-4 based Monte Carlo Dose Calculation Engine (DCE) has been fully implemented in both a LINUX and Windows environment. In the Windows environment, the DCE has been integrated into a full featured treatment planning system. Work is now centered on the development of phase-space source models. The determination of each phase-space model requires substantial computing power and we are porting the code in a manner that will permit the use of parallel processing that, hopefully, will reduce the calculation time required to test model parameters from 3-4 weeks to under 1 day.