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23 March 2010 Coherent scatter tomography using a sliding detector system
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The distribution of coherent scatter is useful for determining the structure of a material, hence computed tomography applying coherent scatter has been developed by several authors. To obtain the exact distribution of coherent scatter a monochromatic, high flux, and highly parallel X-ray beam is required, and therefore, this technique is suited for a synchrotron radiation source. If a synchrotron radiation source is used, rotating the source around the patient or even rotating the patient is difficult. We propose a method for the estimation of coherent scatter distributions from any point, by moving only the position of the detector along the beam path. We acquired projection data at different positions along the beam path, and applied the maximum likelihood expectation maximization algorithm. Simulations and experiments were performed to confirm the effectiveness of this method. The estimated scatter profiles were in approximate agreement with that of the original data. Although improvement in accuracy of the estimation is necessary, this new method is useful if the X-ray source cannot be rotated around the patient.
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Mitsuaki Terabe, Kenzou Inoue, Hiroyuki Okamoto, and Kichirou Koshida "Coherent scatter tomography using a sliding detector system", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76224I (23 March 2010);

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