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The application of spherical standards for the evaluation of the accuracy of mapping shape in computed tomography

Ryniewicz A., Ostrowska K., Ryniewicz W., Sładek J., Bojko Ł., Krawczyk M.

Bio-Algorithms and Med-Systems

2015

Vol. 11, no. 4

231--236

Anatomical structures are characterized by free surfaces, and most are in lobed and pseudo-spherical shapes. The aim of this article is to analyze selected procedures for accuracy assessment of the shape and dimensions of these structures using certified sphere and Ball Bar standards and to propose metrology parameters facilitating comparison of diagnostic devices. The spherical standard of various materials and Ball Bar standards with various distances between spheres centers can be a tool for evaluation of computed tomography metrology applications. Errors in geometry mapping can be identified on the basis of standardized control systems used in coordinate measuring techniques.