Results 201 to 210 of about 8,586 (257)

Superconducting nanowire single-photon detectors for enhanced biomedical imaging. [PDF]

J Biomed Opt
Hughes ECV, Upadhya A, Dholakia K.
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Characterization of a GaAs photon-counting detector for mammography

Journal of Medical Imaging, 2021
Purpose: The purpose of this study was to evaluate the potential of a prototype gallium arsenide (GaAs) photon-counting detector (PCD) for imaging of the breast. Approach: First, the contrast-to-noise ratio (CNR) using different aluminum/poly(methyl methacrylate) (PMMA) phantoms of different thicknesses were measured.
Bahaa, Ghammraoui, Spyridon, Gkoumas, Stephen J, Glick   +2 more
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Improving Paralysis Compensation in Photon Counting Detectors

IEEE Transactions on Medical Imaging, 2021
Photon counting detectors (PCDs) are classically described as being either paralyzable or nonparalyzable. When the PCD is paralyzed, it is no longer sensitive to the detection of additional flux. A recent strategy in PCD design has been to compensate for detector paralysis by embedding specialized paralysis compensation electronics into the application-
Scott S. Hsieh, Kris Iniewski
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Advanced Neuroimaging With Photon-Counting Detector CT

Investigative Radiology, 2023
Abstract Photon-counting detector computed tomography (PCD-CT) is an emerging technology and promises the next step in CT evolution. Photon-counting detectors count the number of individual incoming photons and assess the energy level of each of them. These mechanisms differ substantially from conventional energy-integrating detectors.
Abel, Frederik, Schubert, Tilman, Winklhofer, Sebastian   +2 more
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Pediatric Applications of Photon-Counting Detector CT

American Journal of Roentgenology, 2023
Photon-counting detector (PCD) CT represents the most recent generational advance in CT technology. PCD CT has the potential to reduce image noise, improve spatial resolution and contrast resolution, and provide multispectral capability, all of which may be achieved with an overall decrease in the radiation dose. These effects may be used to reduce the
Joseph, Cao, Steve, Bache, Fides R, Schwartz, Donald, Frush   +3 more
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Photon-counting chip for avalanche detectors

IEEE Photonics Technology Letters, 2005
We present a microelectronic chip that can replace bulky and expensive single-photon-counting boards in many applications. The chip can be assembled with the detector into a microscopic detection head and communicates straight to a host computer. The chip includes an active quenching and active reset circuit for driving a single-photon avalanche diode,
ZAPPA, FRANCO, LOTITO, ARTURO, TISA, SIMONE   +2 more
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Multiplexed photon-counting detectors

SPIE Proceedings, 2008
ABSTRACT We discuss a scheme for a photon-counting detection system that overcomes the difficulties of photon-counting at extremely high rates. Our method uses an array of N detectors and a 1-by- N optical switch with a control circuit to direct input light to live detectors.
S. V. POLYAKOV, I. P. DEGIOVANNI, G. BRIDA, A. MIGDALL, SCHETTINI, VALENTINA   +4 more
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Clinical applications of photon counting detector CT

European Radiology, 2023
The X-ray detector is a fundamental component of a CT system that determines the image quality and dose efficiency. Until the approval of the first clinical photon-counting-detector (PCD) system in 2021, all clinical CT scanners used scintillating detectors, which do not capture information about individual photons in the two-step detection process. In
Cynthia H, McCollough, Kishore, Rajendran, Francis I, Baffour, Felix E, Diehn, Andrea, Ferrero, Katrina N, Glazebrook, Kelly K, Horst, Tucker F, Johnson, Shuai, Leng, Achille, Mileto, Prabhakar Shantha, Rajiah, Bernhard, Schmidt, Lifeng, Yu, Thomas G, Flohr, Joel G, Fletcher   +14 more
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The technical development of photon-counting detector CT

European Radiology, 2023
Since 1971 and Hounsfield's first CT system, clinical CT systems have used scintillating energy-integrating detectors (EIDs) that use a two-step detection process. First, the X-ray energy is converted into visible light, and second, the visible light is converted to electronic signals.
Cynthia H. McCollough, Kishore Rajendran, Shuai Leng, Lifeng Yu, Joel G. Fletcher, Karl Stierstorfer, Thomas G. Flohr   +6 more
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Laser ranging and mapping with a photon-counting detector

Applied Optics, 1996
We propose a new technique for remote sensing: photon-counting laser mapping. MicroChannel plate detectors with a crossed delay-line (MCP/CDL) readout combine high position accuracy and subnanosecond photon timing, at event rates of 10(6) detected photons per second and more.
W C, Priedhorsky, R C, Smith, C, Ho
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