Results 241 to 250 of about 944,632 (294)

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
openaire   +2 more sources

Self-powered perovskite photon-counting detectors

Nature, 2023
Metal-halide perovskites (MHPs) have been successfully exploited for converting photons to charges or vice versa in applications of solar cells, light-emitting diodes and solar fuels1–3, for which all these applications involve strong light. Here we show that self-powered polycrystalline perovskite photodetectors can rival the commercial silicon ...
Ying Zhou, Chengbin Fei, Md Aslam Uddin, Liang Zhao, Zhenyi Ni, Jinsong Huang   +5 more
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

Photon counting detectors for Fabry-Perot interferometers

Applied Optics, 1989
Sealed channel plate photomultipliers with multiple discrete anodes for use as photon counting detectors in the image plane of Fabry-Perot interferometers are described. The influence of design and construction on performance of completed devices is discussed. Effects on spatial resolution, lifetime, and counting efficiency are described.
E H, Darlington, J R, Haviland
openaire   +2 more sources

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
openaire   +2 more sources

Musculoskeletal imaging with a prototype photon-counting detector

European Radiology, 2011
To test a digital imaging X-ray device based on the direct capture of X-ray photons with pixel detectors, which are coupled with photon-counting readout electronics.The chip consists of a matrix of 256 × 256 pixels with a pixel pitch of 55 μm. A monolithic image of 11.2 cm × 7 cm was obtained by the consecutive displacement approach. Images of embalmed
M, Gruber, P, Homolka, M, Chmeissani, M, Uffmann, M, Pretterklieber, F, Kainberger   +5 more
openaire   +2 more sources

Image Photon Counting Detectors

Topical Meeting on Quantum-Limited Imaging and Image Processing, 1986
A comparison of four available detectors, the Boksenberg, the MAMA, the PAPA, and the resistive anode, point out the individual strengths and weakness.
openaire   +1 more source

Photon-counting radiography with the gas microstrip detector

Physics in Medicine and Biology, 1999
We have built a proof of-concept photon-counting x-ray imaging system using a Xe:CH4 gas microstrip detector (GMD) as the image receptor, and have used this system to demonstrate several advantages of photon counting over energy integration. Our experiments spanned x-ray spectra from 10 to 50 kVp and Xe:CH4 pressures from 1 to 4 atm.
D G, Gobbi, M S, Dixit, J, Dubeau, P C, Johns   +3 more
openaire   +2 more sources