SBIR Phase I: An Accurate and Efficient Reconstruction Algorithm for Fast Volumetric X-Ray Computed Tomography (CT)Scanner

*** 9661717 Hu本小企业创新研究一期项目将研究利用大面积探测器和锥形x射线束获取的物体投影重建三维物体的问题。这个问题是体积计算机断层扫描（CT）扫描仪发展的基础，但尚未成功解决。基于项目负责人提出的函数分解概念，探索了一种由圆扫描和线性扫描组成的圆-线扫描轨道“混合型”重构算法。在这个项目中，将研究与该算法相关的剩余问题。具体而言，通过选择最优的理论公式和数值实现，进一步提高算法的数值精度和计算效率。此外，该算法将扩展到处理比检测器高的物体。这种情况在实践中经常发生。研究结果表明，该混合算法将结合现有算法的优点，消除现有算法的缺点，成为锥束扫描仪开发的首选算法，该算法的成功开发将加速快速体积CT扫描仪的商业化。随着通量和体积扫描能力的大幅提高，该技术的应用将在医学、制造业、材料科学和工程领域产生根本性的影响。＊＊＊

*** 9661717 Hu This Small Business Innovation Research Phase I project will study the problem of reconstructing a three dimensional object from its projections acquired with a large area detector and cone-shaped x-ray beams. This problem is fundamental to the volumetric computerized tomography (CT) scanner development and has not yet been successfully solved. Based on the concept of function decomposition developed by the Principal Investigator, a "hybrid-type" reconstruction algorithm for the circle-and-line scanning orbit, consisting of a circular scan and a linear scan has been explored. In this project, the remaining problems associated with this algorithm will be studied. Specifically, the numerical accuracy and computational efficiency of this algorithm will be further improved by selecting the optimal theoretical formulation and numerical implementation. Furthermore, the algorithm will be extended to handle the object that is taller than the detector. This situation routinely occurs in practice. It will be demonstrated that this hybrid-type algorithm will combine the strengths and eliminate the weakness of existing algorithms and therefore could become the preferable algorithm for cone beam scanner development The successful development of this algorithm will accelerate the commercialization of the fast volumetric CT scanner. With drastic improvement in throughput and volume scanning capability, application of this technology will generate fundamental impacts in the fields of medicine, manufacturing industry, material science and engineering. ***