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Recently, a square-pinhole collimator has been proposed for SPECT imaging since it can tile the projection onto the detector efficiently and the fields of view (FOVs) in transverse and axial directions become separable. In this work, we have conducted sensitivity and FOV experiments for eighteen fabricated platinum/iridium(Pt/Ir) inserts with sub-millimeter square-apertures. A sinqθ fit to the experimental...
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