کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10226498 | 1701275 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Measurement of the X-ray computed tomography instrument geometry by minimization of reprojection errors-Implementation on experimental data
ترجمه فارسی عنوان
اندازه گیری هندسه دستگاه های توموگرافی کامپیوتری اشعه ایکس با به حداقل رساندن خطاهای بازتولید - پیاده سازی بر روی داده های تجربی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
چکیده انگلیسی
A procedure for measuring the geometry of X-ray computed tomography (CT) instruments is applied to an experimental CT instrument. In this study, the geometrical measurement procedure is implemented with the CT2 reference object, comprising steel spheres with known center positions in a local coordinate frame affixed to a cylindrical carbon fiber framework. The procedure can be implemented with other sphere-based reference objects, provided the sphere center coordinates are known. The effects of number of acquired projections and rotation mode (stepped or continuous) on the quality of measured geometrical parameters are studied. Finally, the output of the geometrical measurement procedure is used to inform the physical adjustment of the experimental CT instrument to its ideal alignment. The effectiveness of the measurement procedure to correctly determine the instrument geometry is demonstrated from dimensional measurements performed on a tomographically reconstructed validation object from radiographs acquired under initial (misaligned) and adjusted (aligned) instrument geometry.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Precision Engineering - Volume 54, October 2018, Pages 107-117
Journal: Precision Engineering - Volume 54, October 2018, Pages 107-117
نویسندگان
Massimiliano Ferrucci, Petr HeÅmánek, Evelina Ametova, Elia Sbettega, Michal Vopalensky, Ivana Kumpová, Daniel VavÅÃk, Simone Carmignato, Tom Craeghs, Wim Dewulf,