Considerations for high-magnification high-cone-angle helical micro-CT

Trond Varslot; Andrew Kingston; Glenn Myers; Adrian Sheppard

doi:10.1117/12.929304

17 October 2012 Considerations for high-magnification high-cone-angle helical micro-CT

Trond Varslot, Andrew Kingston, Glenn Myers, Adrian Sheppard

Proceedings Volume 8506, Developments in X-Ray Tomography VIII; 850614 (2012) https://doi.org/10.1117/12.929304
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

This paper is motivated by our groups recent move from a conventional micro-CT system with a circular source-trajectory, to that with with a helical source-trajectory. By using a helix we can now image well beyond the limiting cone-angle of 10 degrees for a circle. We routinely perform micro-CT with cone-angles greater than 50° by using the Katsevich theoretically-exact reconstruction algorithm. Imaging with such large cone-angles enables high-signal-to-noise-ratio imaging but requires the specimen to be in a very close proximity to the source. This brings about its own challenges. Here we present experimental considerations and data post-processing techniques that allow us to obtain high-fidelity high-resolution micro-CT images at extreme cone-angles.

Citation Download Citation

Trond Varslot, Andrew Kingston, Glenn Myers, and Adrian Sheppard "Considerations for high-magnification high-cone-angle helical micro-CT", Proc. SPIE 8506, Developments in X-Ray Tomography VIII, 850614 (17 October 2012); https://doi.org/10.1117/12.929304

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