Title

Quasi-Exact Helical Cone Beam Reconstruction for Micro CT

Document Type

Article

Language

eng

Format of Original

4 p.

Publication Date

2002

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Source Publication

Proceedings of the IEEE International Symposium on Biomedical Imaging, Washington, D.C., July 7-10, 2002

Source ISSN

0-7803-7584-X

Original Item ID

doi: 10.1109/ISBI.2002.1029349

Abstract

A cone beam micro-CT system is set up to collect truncated helical cone beam data. This system includes a micro-focal X-ray source, a precision computer-controlled X-Y-Z-theta stage, and an image-intensifier coupled to a large format CCD detector. The helical scanning mode is implemented by rotating and translating the stage while keeping X-ray source and detector stationary. A chunk of bone and a mouse leg are scanned and quasi-exact reconstruction is performed using the approach proposed in J. Hu et al. (2001). This approach introduced the original idea of accessory paths with upper and lower virtual detectors having infinite axial extent. It has a filtered backprojection structure which is desirable in practice and possesses the advantages of being simple to implement and computationally efficient compared to other quasi-exact helical cone beam algorithms for the long object problem.

Comments

Proceedings of the IEEE International Symposium on Biomedical Imaging, Washington, D.C., July 7-10, 2002, (2002): 681 - 684. DOI.