Dr. Asaf Zuck Profile

Dr. Asaf Zuck

Researcher at IIBR

SPIE Involvement:

Author

Publications (19)

Proceedings Article | 30 August 2006 Paper

Semiconductor polycrystalline alpha detectors

M. Schieber, M. Roth, A. Zuck, G. Marom, O. Khakhan, Z. Alfassi

Proceedings Volume 6319, 631914 (2006) https://doi.org/10.1117/12.683913

KEYWORDS: Sensors, Composites, Americium, Particles, Collimators, Boron, Semiconductors, Radium, Signal to noise ratio, Californium

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Proceedings Article | 17 September 2005 Paper

Nuclear spectroscopy with polycrystalline-PbI₂ radiation detectors

M. Schieber, N. Zamoshchuk, O. Khakhan, A. Zuck

Proceedings Volume 5922, 59220B (2005) https://doi.org/10.1117/12.619639

KEYWORDS: Crystals, Annealing, Electrons, Spectroscopy, Light emitting diodes, Electrodes, Sensors, Gold, Lead, Particles

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Proceedings Article | 10 January 2003 Paper

Delayed emission of surface-generated trapped carriers in transient charge transport of single-crystal and polycrystalline HgI2

Asaf Zuck, Michael Schieber, Oleg Khakhan, Zeev Burshtein

Proceedings Volume 4784, (2003) https://doi.org/10.1117/12.455774

KEYWORDS: Crystals, Electrons, Sensors, Electrodes, Particles, Absorption, X-ray detectors, Physical vapor deposition, Time metrology, Radiography

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Proceedings Article | 10 January 2003 Paper

Medical imaging with mercuric iodide direct digital radiography flat-panel x-ray detectors

Haim Gilboa, Asaf Zuck, O. Dagan, Alex Vilensky, B. Breen, A. Taieb, B. Reisman, H. Hermon, George Zentai, Larry Partain, Robert Street, S. Ready

Proceedings Volume 4784, (2003) https://doi.org/10.1117/12.450503

KEYWORDS: X-rays, Sensors, X-ray detectors, Image resolution, Signal attenuation, Selenium, Coating, Imaging arrays, X-ray imaging, Imaging systems

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Proceedings Article | 11 June 2002 Paper

Large area mercuric iodide thick film x-ray detectors for fluoroscopic (on-line) imaging

George Zentai, Larry Partain, Raisa Pavlyuchkova, Cesar Proano, Gary Virshup, Barry Breen, Asaf Zuck, Benjamin Reisman, A. Taieb, Michael Schieber

Proceedings Volume 4702, (2002) https://doi.org/10.1117/12.469906

KEYWORDS: X-rays, Imaging systems, Sensors, X-ray imaging, X-ray detectors, Image resolution, Modulation transfer functions, Imaging arrays, Nondestructive evaluation, Coating

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Proceedings Article | 3 May 2002 Paper

Approaching the theoretical x-ray sensitivity with Hgl2 direct detection image sensors

Robert Street, Steve Ready, Leonid Melekhov, Jackson Ho, Asaf Zuck, Barry Breen

Proceedings Volume 4682, (2002) https://doi.org/10.1117/12.465584

KEYWORDS: X-rays, Absorption, X-ray imaging, Ionization, Image sensors, Imaging systems, Signal attenuation, Photoresistors, Mammography, Radiography

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Proceedings Article | 3 May 2002 Paper

Large-area mercuric iodide x-ray imager

George Zentai, Larry Partain, Raisa Pavlyuchkova, Gary Virshup, Asaf Zuck, Leonid Melekhov, O. Dagan, Alexander Vilensky, Haim Gilboa

Proceedings Volume 4682, (2002) https://doi.org/10.1117/12.465604

KEYWORDS: Sensors, X-rays, X-ray imaging, Image resolution, X-ray detectors, Thin film coatings, Imaging arrays, Modulation transfer functions, Imaging systems, Signal attenuation

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Single crystals of mercuric iodide have been studied for many years for nuclear detectors. We have investigated the use of x-ray photoconductive polycrystalline mercuric iodide coatings on amorphous silicon flat panel thin film transistor (TFT) arrays as x-ray detectors for radiographic and fluoroscopic applications in medical imaging. The mercuric iodide coatings were vacuum deposited by Physical Vapor Deposition (PVD). This coating technology is capable of being scaled up to sizes required in common medical imaging applications. Coatings were deposited on 4 inches X 4 inches TFT arrays for imaging performance evaluation and also on conductive-coated glass substrates for measurements of x-ray sensitivity, dark current and image lag. The TFT arrays used included pixel pitch dimensions of both 100 and 139 microns. Coating thickness between 150 microns and 250 microns were tested in the 25 kVp-100 kVp x-ray energy range utilizing exposures typical for both fluoroscopic, and radiographic imaging. X-ray sensitivities measured for the mercuric iodide samples and coated TFT detectors were superior to any published results for competitive materials (up to 7100 ke/mR/pixel for 100 micron pixels). It is believed that this higher sensitivity, can result in fluoroscopic imaging signal levels high enough to overshadow electronic noise. Image lag characteristics appear adequate for fluoroscopic rates. Resolution tests on resolution target phantoms showed that resolution is limited to the Nyquist frequency for the 139 micron pixel detectors. The ability to operate at low voltages gives adequate dark currents for most applications and allows low voltage electronics designs. Mercuric Iodide coated TFT arrays were found to be outstanding candidates for direct digital radiographic detectors for both static and dynamic (fluoroscopic) applications. Their high x-ray sensitivity, high resolution, low dark current, low voltage operation, and good lag characteristics provide a unique combination of desirable imaging performance parameters.

Proceedings Article | 19 December 2001 Paper

Electrical properties of polycrystalline mercuric iodide x-ray detectors

Haim Hermon, Robert Street, Leonid Melekhov, Asaf Zuck, Alexander Vilensky, Steve Ready, George Zentai, Michael Schieber, Larry Partain

Proceedings Volume 4508, (2001) https://doi.org/10.1117/12.450792

KEYWORDS: Sensors, X-rays, X-ray detectors, Spatial resolution, Imaging arrays, X-ray imaging, Imaging systems, Amorphous silicon, Radiography, Image resolution

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Proceedings Article | 24 July 2001 Paper

Nondestructive imaging with mercuric iodide thick film x-ray detectors

Michael Schieber, Haim Hermon, Asaf Zuck, Alexander Vilensky, Leonid Melekhov, Michael Lukach, Evgenie Meerson, Yehezkel Saado, E. Shtekel, Benjamin Reisman, G. Zentai, L. Partain, E. Seppi, Raisa Pavlyuchkova, G. Virshup, Robert Street, Steve Ready

Proceedings Volume 4335, (2001) https://doi.org/10.1117/12.434200

KEYWORDS: Imaging systems, X-rays, Sensors, Image resolution, Nondestructive evaluation, X-ray detectors, Surface plasmons, X-ray imaging, Crystals, Electrodes

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Proceedings Article | 28 June 2001 Paper

Comparative study of Pbl2 and Hgl2 as direct detector materials for high-resolution x-ray image sensors

Robert Street, Marcelo Mulato, Michael Schieber, Haim Hermon, Kanai Shah, Paul Bennett, Yuri Dmitryev, Jackson Ho, Rachel Lau, Evgenie Meerson, Steve Ready, Benjamin Reisman, Y. Sado, Koenraad Van Schuylenbergh, Alexander Vilensky, Asaf Zuck

Proceedings Volume 4320, (2001) https://doi.org/10.1117/12.430858

KEYWORDS: X-rays, X-ray imaging, Signal attenuation, Imaging systems, Absorption, Electrons, Image sensors, Mammography, Chlorine, X-ray detectors

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Proceedings Article | 28 June 2001 Paper

Deposition of thick films of polycrystalline mercuric iodide x-ray detectors

Haim Hermon, Michael Schieber, Asaf Zuck, Alexander Vilensky, Leonid Melekhov, E. Shtekel, A. Green, O. Dagan, Steve Ready, Robert Street, E. Seppi, Raisa Pavlyuchkova, G. Virshup, G. Zentai, L. Partain

Proceedings Volume 4320, (2001) https://doi.org/10.1117/12.430922

KEYWORDS: Imaging systems, Sensors, X-ray imaging, X-rays, Electrodes, X-ray detectors, Imaging arrays, Dielectrics, Clocks, Physical vapor deposition

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Proceedings Article | 18 December 2000 Paper

Mercuric iodide thick films for radiological x-ray detectors

Michael Schieber, Haim Hermon, Robert Street, Steve Ready, Asaf Zuck, Alexander Vilensky, Leonid Melekhov, Rubil Shatunovsky, Michael Lukach, Evgenie Meerson, Yehezkel Saado, Eithan Pinkhasy

Proceedings Volume 4142, (2000) https://doi.org/10.1117/12.410563

KEYWORDS: Sensors, X-rays, X-ray detectors, Electrodes, Surface plasmons, Dielectric polarization, X-ray imaging, Signal detection, Gold, Polarization

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Proceedings Article | 18 December 2000 Paper

High-resolution x-ray image sensors based on HgI2

Robert Street, Marcelo Mulato, Steve Ready, Rachel Lau, Jackson Ho, Koenraad Van Schuylenbergh, Michael Schieber, Haim Hermon, Asaf Zuck, Alexander Vilensky

Proceedings Volume 4142, (2000) https://doi.org/10.1117/12.410562

KEYWORDS: X-rays, X-ray imaging, Image sensors, Ionization, Interference (communication), Absorption, Modulation transfer functions, Electronics, Crystals, Electrons

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Proceedings Article | 25 April 2000 Paper

Radiological x-ray response of polycrystalline mercuric-iodide detectors

Michael Schieber, Haim Hermon, Robert Street, Steve Ready, Asaf Zuck, Alexander Vilensky, Leonid Melekhov, Rubil Shatunovsky, Evgenie Meerson, Yehezkel Saado

Proceedings Volume 3977, (2000) https://doi.org/10.1117/12.384520

KEYWORDS: X-rays, Sensors, Electrodes, X-ray detectors, Amorphous silicon, Polymers, Image sensors, X-ray imaging, Gold, Photoresistors

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Proceedings Article | 19 October 1999 Paper

High-flux x-ray response of composite mercuric iodide detectors

Michael Schieber, Asaf Zuck, Leonid Melekhov, Rubil Shatunovsky, Haim Hermon, Renato Turchetta

Proceedings Volume 3768, (1999) https://doi.org/10.1117/12.366594

KEYWORDS: Sensors, Crystals, Composites, Semiconductors, X-rays, Dielectrics, X-ray detectors, Polymers, Capacitance, Radiology

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Proceedings Article | 6 October 1999 Paper

Polycrystalline mercuric iodide detectors

Michael Schieber, Haim Hermon, Asaf Zuck, Alexander Vilensky, Leonid Melekhov, Rubil Shatunovsky, Evgenie Meerson, Yehezkel Saado

Proceedings Volume 3770, (1999) https://doi.org/10.1117/12.368177

KEYWORDS: X-rays, Sensors, X-ray detectors, Crystals, Electrodes, Surface plasmons, Electrons, Silicon, Metals, X-ray imaging

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Proceedings Article | 10 November 1998 Paper

VLSI readout for imaging with polycrystalline mercuric iodide detectors

Renato Turchetta, Wojtek Dulinski, D. Husson, N. Klein, J. Riester, Michael Schieber, Asaf Zuck, M. Braiman, Leonid Melekhov, J. Nissenbaum, S. Sanguinetti

Proceedings Volume 3445, (1998) https://doi.org/10.1117/12.330293

KEYWORDS: Sensors, Electrodes, Ceramics, Very large scale integration, Electronics, Spatial resolution, Crystals, Particles, Electrons, Gold

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Proceedings Article | 1 April 1998 Paper

Large-area HgI2 pixel detector experiments

Michael Schieber, Asaf Zuck, M. Braiman, Leonid Melekhov, J. Nissenbaum, Renato Turchetta, Wojtek Dulinski, D. Husson, J. Riester, S. Sanguinetti, M. Montalti, M. Guzzi

Proceedings Volume 3301, (1998) https://doi.org/10.1117/12.304564

KEYWORDS: Sensors, Electrodes, Ceramics, Surface plasmons, Signal detection, Electrons, Crystals, Semiconductors, Electronics, Image sensors

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