Fast high-resolution micro-CT with exact reconstruction methods

T. Varslot, A. Kingston, A. Sheppard, A. Sakellariou, Stuart R. Stock
<span title="2010-08-19">2010</span> <i title="SPIE"> Developments in X-Ray Tomography VII </i> &nbsp;
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
more &raquo; ... 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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