中文摘要：

随着人机交互技术的不断发展，对三维人机交互的支持在三维图形软件中占有越来越重要的地位，而在医学影像处理与分析领域，它对于更方便、准确地使用可视化的结果辅助医生进行诊断具有重要意义。该文针对医学影像处理与分析领域中三维交互的需求与特点，设计并实现了一个基于3D Widgets的三维人机交互软件平台，包括以3D Widgets为核心的交互框架、各功能模块以及一些实用的Widgets的设计和实现，并给出了一组应用实例。其最终目的是为医学影像处理与分析领域提供一个灵活可靠和可扩展的三维交互平台。

英文摘要：

With the development of human computer interaction technology, the support for 3 - D interaction takes more and more important place in 3 - D computer graphics software. And in the field of medical image processing and analyzing, it has particularly important meaning to use the results of medical image visualization more easily and more exactly for diagnosis assistant. Taking aim at the requirements and characteristics in the field of medical image processing and analyzing, we design and implement a 3 - D human computer interaction software platform based on 3 - D widgets, including the design and implementation of the whole framework, each function module and some practical widgets. Then we also give a group of application instances. The ultimate objective is to provide a flexible, reliable and extensible 3 - D interaction platform for medical image processing and analyzing.