2020
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Abstract: Purpose: Smaller pixel sizes of x-ray photon counting detectors (PCDs) are advantageous for count rate capabilities but disadvantageous for charge sharing. With charge sharing, the energy of an x-ray photon may be split and one photon may produce two or more counts at adjacent pixels, both at lower energies than the incident energy. This "double-counting" increases noise variance and degrades the spectral response. Overall, it has a significantly negative impact on the performance of PCD-based computed tomogra… Show more

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Cited by 10 publications
(90 citation statements)
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References 39 publications
(90 reference statements)
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“…In this case, a count is also added to a coincidence counter of the corresponding neighbor pixel, CC XY , as the circuitry for MEICC in each pixel processes coincidences with its own neighboring pixels independently and in parallel. This figure is from [34]. Fig.…”
Section: B Boxcar Versus Flat-field Signalsmentioning
confidence: 99%
“…We used the following three different physics tasks with different dimensionality that are relevant to three clinical applications in this study: 1) the line integral estimation of water for the conventional CT imaging; 2) water thickness estimation for water-bone material density imaging; and 3) gold thickness estimation for K-edge imaging with water-bone-gold material decomposition. Note that the conventional CT imaging is a 1-D estimation problem and is different from monochromatic CT imaging used in [34] that is a 2-D estimation problem The lines and spheres are X-rays and electronic charge clouds; those in blue and red are generated with conditions 1 and 2, respectively. Numbers are the number of counts produced at the POI.…”
Section: Three Physics Tasksmentioning
confidence: 99%
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“…A wide range of CSCAs have been proposed [13][14][15][16]; however, this work will focus on those implemented on chip. These CSCAs can broadly be divided into online techniques and offline techniques.…”
Section: Introductionmentioning
confidence: 99%