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20 September 2010Fast high-resolution micro-CT with exact reconstruction methods
We have constructed a helical trajectory X-ray micro-CT system which enables high-resolution tomography
within practical acquisition times. In the quest for ever-increasing resolution, lab-based X-ray micro-CT systems
are limited by the spot size of the X-ray source. Unfortunately, decreasing the spot size reduces the X-ray flux,
and therefore the signal-to-noise ratio (SNR). The reduced source flux can be offset by moving the detector closer
to the source, thereby capturing a larger solid angle of the X-ray beam. We employ a helical scanning trajectory,
accompanied by an exact reconstruction method to avoid the artifacts resulting from the use of large cone-angles
with circular trajectories. In this paper, we present some challenges which arise when adopting this approach in
a high-resolution cone-beam micro-CT system.
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T. Varslot, A. Kingston, A. Sheppard, A. Sakellariou, "Fast high-resolution micro-CT with exact reconstruction methods," Proc. SPIE 7804, Developments in X-Ray Tomography VII, 780413 (20 September 2010);