2021
DOI: 10.1002/mp.15154
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Improving digital charge sharing compensation in photon counting detectors with a low‐threshold comparator

Abstract: Charge sharing is a major non-ideality in photon counting detectors (PCDs) and can increase variance in material decomposition images. Analog charge summing (ACS) is an effective mechanism for charge sharing compensation (CSC), but is complex to implement and may limit the maximum count rate of the PCD. Digital CSC mechanisms such as digital count summing (DCS) may be simpler to implement; however, earlier simulation studies suggest that digital CSC only provides half the benefit of ACS. We propose including a… Show more

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Cited by 2 publications
(2 citation statements)
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“…Experimental measurements of the ASIC of one Si PCD found an electronic noise standard deviation of 1.6 keV 29 . Some previous modeling efforts have selected 5 keV as the lowest energy threshold, but we think this may be optimistic, considering that five standard deviations is necessary to eliminate electronic noise 30 . However, a 5 keV energy threshold may be achievable with future ASICs and is also used here.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Experimental measurements of the ASIC of one Si PCD found an electronic noise standard deviation of 1.6 keV 29 . Some previous modeling efforts have selected 5 keV as the lowest energy threshold, but we think this may be optimistic, considering that five standard deviations is necessary to eliminate electronic noise 30 . However, a 5 keV energy threshold may be achievable with future ASICs and is also used here.…”
Section: Methodsmentioning
confidence: 99%
“…29 Some previous modeling efforts have selected 5 keV as the lowest energy threshold, but we think this may be optimistic, considering that five standard deviations is necessary to eliminate electronic noise. 30 However, a 5 keV energy threshold may be achievable with future ASICs and is also used here. Charge sharing effects are problematic for CdTe PCDs, but also detrimental for Si PCDs.…”
Section: Models Of Other Non-idealitiesmentioning
confidence: 99%