2013
DOI: 10.1118/1.4820371
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Abstract: Photon counting detectors (PCDs) with energy discrimination capabilities have been developed for medical x-ray computed tomography (CT) and x-ray (XR) imaging. Using detection mechanisms that are completely different from the current energy integrating detectors and measuring the material information of the object to be imaged, these PCDs have the potential not only to improve the current CT and XR images, such as dose reduction, but also to open revolutionary novel applications such as molecular CT and XR ima… Show more

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Cited by 732 publications
(674 citation statements)
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“…This phenomenon is known as "pulse pileup" and negatively affects image quality, Hounsfield unit accuracy, and material decomposition. 8 However, recent advances in PCD technology with high-speed application-specific integrated circuits and small pixel sizes have led to the development of PCDs resistant to pulse pileup at clinically routine CT tube currents. 15 Another PCD artifact is charge sharing, which occurs when the energy of an x-ray photon is distributed across multiple adjacent detector pixels, reducing the accuracy of the detected photon energy.…”
Section: Discussionmentioning
confidence: 99%
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“…This phenomenon is known as "pulse pileup" and negatively affects image quality, Hounsfield unit accuracy, and material decomposition. 8 However, recent advances in PCD technology with high-speed application-specific integrated circuits and small pixel sizes have led to the development of PCDs resistant to pulse pileup at clinically routine CT tube currents. 15 Another PCD artifact is charge sharing, which occurs when the energy of an x-ray photon is distributed across multiple adjacent detector pixels, reducing the accuracy of the detected photon energy.…”
Section: Discussionmentioning
confidence: 99%
“…PCDs measure the number of detected x-ray photons (ie, photon count) and their photon energy. [6][7][8][9][10][11] These characteristics allow equal weighting of low-and high-energy photons and may therefore be useful for improving soft-tissue contrast in the brain. 8 In addition, the direct conversion and counting of individual photons provide a better estimate of the underlying photon statistics, which, in turn, may improve image quality by reducing image noise.…”
mentioning
confidence: 99%
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“…1 Due to the combination of direct x-ray detection in the high-Z semiconductor sensor and single photon counting electronics in each pixel of the ASIC, such detectors offer high detection efficiency (above 70% up to energies of 60 keV), high spatial resolution (below 100 lm), high maximum count rate capability (up to 10 9 counts/mm 2 /s), and good energy resolution (2-5 keV in an energy range from 5 to 140 keV). In the field of x-ray diffraction, HPC detectors proved to be a disruptive technology 2 both for scientific and industrial applications.…”
Section: Introductionmentioning
confidence: 99%
“…Energy sensitive pixel detectors are finding applications in X-ray imaging [1,2]. These devices not only provide a high spatial resolution, but they are also capable of energy estimation at single photon level.…”
Section: Introductionmentioning
confidence: 99%