Charge Summing in Spectroscopic X-Ray Detectors With High-Z Sensors

Koenig, Thomas; Hamann, Elias; Procz, S.; Ballabriga, R.; Cecilia, A.; Zubér, M. S.; Llopart, X.; Campbell, M.; Fauler, A.; Baumbach, Tilo; Fiederle, M.

doi:10.1109/tns.2013.2286672

Cited by 90 publications

(104 citation statements)

References 22 publications

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“…13,29 The recorded spectra had substantially decreased low energy tailing and distinct K-escape peaks. 52 The spectrum measured with a pixel pitch as small as 55-μm with anti-charge sharing looks comparable to that measured by a 165-μm pitch pixel without anticharge sharing, which has a nine times larger pixel area. The smaller continuum tail of the recorded spectrum may provide significant advantages in material decomposition and K-edge imaging.…”

Section: B2bmentioning

confidence: 56%

Vision 20/20: Single photon counting x‐ray detectors in medical imaging

2013

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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 imaging. The performance of PCDs is not flawless, however, and it seems extremely challenging to develop PCDs with close to ideal characteristics. In this paper, the authors offer our vision for the future of PCD-CT and PCD-XR with the review of the current status and the prediction of (1) detector technologies, (2) imaging technologies, (3) system technologies, and (4) potential clinical benefits with PCDs.

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Section: B2bmentioning

confidence: 56%

Vision 20/20: Single photon counting x‐ray detectors in medical imaging

2013

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“…8 Multiple anti-chargesharing techniques are currently being developed to limit this artifact. 31,32 There are several limitations of this study. Unlike the EID system, the current implementation of the PCD prototype does not support z-flying focal spot technology.…”

Section: Discussionmentioning

confidence: 95%

Photon-Counting CT of the Brain: In Vivo Human Results and Image-Quality Assessment

Pourmorteza

Symons

Reich

et al. 2017

AJNR Am J Neuroradiol

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“…Charges from the nearby pixels in coincident events are summed up and the total charge is assigned to the pixel which collects the most charge. Substantial improvement of spectral performance has been observed using this technique (25, 26). …”

Section: Technical Approaches To Multi-energy Ctmentioning

confidence: 99%

Dual- and Multi-Energy CT: Principles, Technical Approaches, and Clinical Applications

McCollough¹,

Leng²,

Yu³

et al. 2015

Radiology

1,252

970

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In x-ray computed tomography (CT), materials having different elemental compositions can be represented by identical pixel values in a CT image (i.e. CT number values), depending on the materials’ mass density. Thus, the differentiation and classification of different tissue types and contrast agents can be extremely challenging. In dual-energy CT (DECT), an additional attenuation measurement is obtained with a second x-ray spectrum (i.e. a second “energy”), allowing the differentiation of multiple materials. Alternatively, this allows quantification of the mass density of two or three materials in a mixture with known elemental composition. Recent advances in the use of energy-resolving, photon-counting detectors for CT imaging suggest the ability to acquire data in multiple energy bins, which is expected to further improve the signal-to-noise ratio for material-specific imaging. In this work, the underlying motivation and physical principles of dual- or multi-energy CT are reviewed and each of the current technical approaches described. In addition, current and evolving clinical applications are introduced.

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Charge Summing in Spectroscopic X-Ray Detectors With High-Z Sensors

Cited by 90 publications

References 22 publications

Vision 20/20: Single photon counting x‐ray detectors in medical imaging

Vision 20/20: Single photon counting x‐ray detectors in medical imaging

Photon-Counting CT of the Brain: In Vivo Human Results and Image-Quality Assessment

Dual- and Multi-Energy CT: Principles, Technical Approaches, and Clinical Applications

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