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Developments in X-Ray Tomography VII
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<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1117/12.860298">doi:10.1117/12.860298</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/x2chljmiajgrtmzvpsaersehh4">fatcat:x2chljmiajgrtmzvpsaersehh4</a> </span>
more »... 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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