General Geometry CT Reconstruction
نویسندگان
چکیده
We present an efficient and accurate reconstruction technique for computed tomography (CT) images from a geometrically unconstrained set of ray sums. Current CT-scanners are immobile. However, a new era in x-ray production could usher in new, lightweight, flexible and portable x-ray devices. The proposed device, currently under development, is envisioned as a flexible band with tiny x-ray emitters and detectors attached. The device is to be wrapped around an appendage and an image obtained. Such a device would be desirable as it can increase the speed of medical diagnosis. To evaluate the feasibility of reconstructing a CT image from such a device, a simulation testbed was built to generate simulated CT ray sums of a test image. This data was then used in our reconstruction method, which involves slotting each ray sum onto a grid of data that represents what would have been acquired by a parallel-beam CT scanner. Once in that form, Filtered Back Projection can be used to perform the recostruction. Observation of sample reconstructions, as well as quantitative results, suggest that this simple method is efficient
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