基于CT、MRI、PET图像的三维后装治疗计划系统的应用，提高了剂量计算的精确度和准确度。
The application of 3-D treatment planning system based on CT? MRI? PET images has increased the precision and accuracy in dose calculation of after-loading brachytherapy.
后装系统中最关键的技术是医学图像可视化，治疗计划剂量的优化等。
The pivotal techno logies in after-loading system are visualization of medical image, optimization of dose computation calculation, etc.
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