Technique for obtaining sub-pixel spatial resolution and corrected energy determination from room temperature solid state gamma and X-ray detectors with segmented readout
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United States of America Patent
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Dec 14, 1999
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Dec 17, 1997
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Dec 20, 1996
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Abstract
A method and apparatus for obtaining the planar location with sub-pixel resolution and corrected energy of a gamma or X-ray photon interacting with a room temperature solid state detector of given thickness. The detector comprises two electrodes of negative and positive polarities. One of the electrodes is common, and the other is segmented being formed with segmented readout elements. Each of the readout elements defines a pixel size. Depending on that the negative or positive electrode is segmented, respectively, negative-induces charge signals are induced on the readout elements or both a positive-induced charge signal is induced on a central readout element and negative-induced charge signals are induced on adjacent readout elements. Accordingly, respective induced-charge signals are simultaneously measured and statistically correlated on the respective readout elements with detector response templates so as to obtain a best fit template, thereby determining the photon's energy, location and depth of interaction.
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