This paper presents a method for improved analysis of objects with an axial symmetry using X-ray Computed Tomography (CT). Cylindrical coordinates about an axis fixed to the object form the most natural base to check certain characteristics of objects that contain such symmetry, as often occurs with industrial parts. The sampling grid corresponds with the object, allowing for down-sampling hence reducing the reconstruction time. This is necessary for in-line applications and fast quality inspection. With algebraic reconstruction it permits the use of a pre-computed initial volume perfectly suited to fit a series of scans where same-type objects can have different positions and orientations, as often encountered in an industrial setting. Weighted back-projection can also be included when some regions are more likely subject to change, to improve stability. Building on a Cartesian grid reconstruction code, the feasibility of reusing the existing ray-tracers is checked against other researches in the same field.

中文翻译：

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圆柱形物体的快速断层扫描检测

本文提出了一种使用 X 射线计算机断层扫描 (CT) 改进轴对称物体分析的方法。围绕固定在对象上的轴的圆柱坐标形成了检查包含这种对称性的对象的某些特征的最自然的基础，这在工业零件中经常发生。采样网格与对象相对应，允许下采样从而减少重建时间。这对于在线应用和快速质量检查是必要的。通过代数重建，它允许使用预先计算的初始体积，非常适合适合一系列扫描，其中相同类型的对象可以具有不同的位置和方向，这在工业环境中经常遇到。当某些区域更有可能发生变化时，也可以包括加权反投影，以提高稳定性。在笛卡尔网格重建代码的基础上，根据同一领域的其他研究检查重用现有光线追踪器的可行性。