三源锥束螺旋CT成像方法研究

项目名称： 三源锥束螺旋CT成像方法研究

项目编号： No.61201430

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 陈明

作者单位： 山东科技大学

项目金额： 25万元

中文摘要： 多源锥束CT能够突破传统CT时间分辨率的局限，在动态器官成像方面具有独特的优势，目前已成为国际研究热点。此外，多源CT在能量成像方面更具优势，它能够获得更丰富的物质结构和成分信息，有助于疾病的早期诊断。三源锥束CT技术作为新一代的代表，正处于研究活跃期，存在很多问题亟待解决。本项目主要研究：(1)根据Smith 三维精确重建的充要条件，设计不同半径的三源三螺旋扫描模式，结合跨PI线和M线的概念，推导不同半径的三螺旋CT重建公式，实现同样设备下更大水平视野的三维精确重建；(2)分析重建算法的并行性，开展GPU加速重建算法；(3)进一步考虑多能谱下的三螺旋CT重建，提高重建图像衬度。本项目的顺利实施能够给医学三源CT设备的设计、研发提供重要指导。

中文关键词： XCT；锥束螺旋CT；CT图像重建；多能CT；

英文摘要： Multiple-cone-beam CT can breakthrough the limitation of the traditional time resolution, and has a unique advantage on dynamic organ imaging. Now, it is an international research hotspot. In addition, multi-source CT also has more advantage on energy imaging. And it gets more abundant material structure and component information. This contributes to early diagnosis of some diseases. As a representative, triple-cone-beam CT is in active study period. So there are many problems to be solved. Here we mainly: (1) According to the necessary and sufficient condition of the Smith three-dimensional accurate reconstruction, design the triple-cone-beam scan mode with different radius; using inter-helix PI-line and M-line, deduce reconstruction formula; and get more accurate 3D reconstruction of larger horizontal vision in the same equipment condition; (2) analyzing parallel in reconstruction algorithm, develop GPU accelerated reconstruction algorithm; (3) further consider triple-cone-beam CT reconstruction under multi energy spectrum for improving the reconstruction image contrast. The implementation of the project can provide important guidance for research and development of medical CT equipment.

英文关键词： XCT；cone-beam helical CT；image reconstruction；multiple energy spectrum CT；