48×48 CdZnTe array with multiplexer readout

D. G. Marks; H. B. Barber; H. H. Barrett; E. L. Dereniak; J. D. Eskin; K. J. Matherson; J. M. Woolfenden; E. T. Young; F. L. Augustine; W. J. Hamilton; J. E. Venzon; B. A. Apotovsky; F. P. Doty

48×48 CdZnTe array with multiplexer readout

D. G. Marks, H. B. Barber, H. H. Barrett, E. L. Dereniak, J. D. Eskin, K. J. Matherson, J. M. Woolfenden, E. T. Young, F. L. Augustine, W. J. Hamilton, J. E. Venzon, B. A. Apotovsky, F. P. Doty

Medical Imaging

Research output: Contribution to conference › Paper › peer-review

5 Scopus citations

Abstract

We report results of gamma-ray imaging and energy-resolution tests of a 48×48 CdZnTe array. Our detectors have 125 μm square pixel electrodes produced by photolithography and are indium-bump-bonded to a multiplexer readout circuit. Using a collimated beam of 140 keV gamma rays of 120 μm diameter centered on one pixel, we found that the majority of events produced significant charge deposition in nearby pixels. Charge and energy are transported out of the pixel by charge diffusion, photoelectron range, Compton scattering, and escape of K x rays. These effects also distort single-pixel spectra, although photopeaks are still discernible at 140 keV. When signals from neighboring pixels are summed together to correct for this charge spreading, an energy resolution of 10 keV is obtained at 140 keV. Corrections will be simpler and energy resolution should be better for the 380 μm pixels of the 64×64 CdZnTe arrays we are constructing for an ultra-high-resolution brain imager.

Original language	English (US)
Pages	752-756
Number of pages	5
State	Published - 1995
Event	Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3) - San Francisco, CA, USA Duration: Oct 21 1995 → Oct 28 1995

Other

Other	Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3)
City	San Francisco, CA, USA
Period	10/21/95 → 10/28/95

ASJC Scopus subject areas

Radiation
Nuclear and High Energy Physics
Radiology Nuclear Medicine and imaging

Cite this

Marks, D. G., Barber, H. B., Barrett, H. H., Dereniak, E. L., Eskin, J. D., Matherson, K. J., Woolfenden, J. M., Young, E. T., Augustine, F. L., Hamilton, W. J., Venzon, J. E., Apotovsky, B. A., & Doty, F. P. (1995). 48×48 CdZnTe array with multiplexer readout. 752-756. Paper presented at Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3), San Francisco, CA, USA.

Marks, DG, Barber, HB, Barrett, HH, Dereniak, EL, Eskin, JD, Matherson, KJ, Woolfenden, JM, Young, ET, Augustine, FL, Hamilton, WJ, Venzon, JE, Apotovsky, BA & Doty, FP 1995, '48×48 CdZnTe array with multiplexer readout', Paper presented at Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3), San Francisco, CA, USA, 10/21/95 - 10/28/95 pp. 752-756.

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title = "48×48 CdZnTe array with multiplexer readout",

abstract = "We report results of gamma-ray imaging and energy-resolution tests of a 48×48 CdZnTe array. Our detectors have 125 μm square pixel electrodes produced by photolithography and are indium-bump-bonded to a multiplexer readout circuit. Using a collimated beam of 140 keV gamma rays of 120 μm diameter centered on one pixel, we found that the majority of events produced significant charge deposition in nearby pixels. Charge and energy are transported out of the pixel by charge diffusion, photoelectron range, Compton scattering, and escape of K x rays. These effects also distort single-pixel spectra, although photopeaks are still discernible at 140 keV. When signals from neighboring pixels are summed together to correct for this charge spreading, an energy resolution of 10 keV is obtained at 140 keV. Corrections will be simpler and energy resolution should be better for the 380 μm pixels of the 64×64 CdZnTe arrays we are constructing for an ultra-high-resolution brain imager.",

author = "Marks, {D. G.} and Barber, {H. B.} and Barrett, {H. H.} and Dereniak, {E. L.} and Eskin, {J. D.} and Matherson, {K. J.} and Woolfenden, {J. M.} and Young, {E. T.} and Augustine, {F. L.} and Hamilton, {W. J.} and Venzon, {J. E.} and Apotovsky, {B. A.} and Doty, {F. P.}",

year = "1995",

language = "English (US)",

pages = "752--756",

note = "Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3) ; Conference date: 21-10-1995 Through 28-10-1995",

}

TY - CONF

T1 - 48×48 CdZnTe array with multiplexer readout

AU - Marks, D. G.

AU - Barber, H. B.

AU - Barrett, H. H.

AU - Dereniak, E. L.

AU - Eskin, J. D.

AU - Matherson, K. J.

AU - Woolfenden, J. M.

AU - Young, E. T.

AU - Augustine, F. L.

AU - Hamilton, W. J.

AU - Venzon, J. E.

AU - Apotovsky, B. A.

AU - Doty, F. P.

PY - 1995

Y1 - 1995

N2 - We report results of gamma-ray imaging and energy-resolution tests of a 48×48 CdZnTe array. Our detectors have 125 μm square pixel electrodes produced by photolithography and are indium-bump-bonded to a multiplexer readout circuit. Using a collimated beam of 140 keV gamma rays of 120 μm diameter centered on one pixel, we found that the majority of events produced significant charge deposition in nearby pixels. Charge and energy are transported out of the pixel by charge diffusion, photoelectron range, Compton scattering, and escape of K x rays. These effects also distort single-pixel spectra, although photopeaks are still discernible at 140 keV. When signals from neighboring pixels are summed together to correct for this charge spreading, an energy resolution of 10 keV is obtained at 140 keV. Corrections will be simpler and energy resolution should be better for the 380 μm pixels of the 64×64 CdZnTe arrays we are constructing for an ultra-high-resolution brain imager.

AB - We report results of gamma-ray imaging and energy-resolution tests of a 48×48 CdZnTe array. Our detectors have 125 μm square pixel electrodes produced by photolithography and are indium-bump-bonded to a multiplexer readout circuit. Using a collimated beam of 140 keV gamma rays of 120 μm diameter centered on one pixel, we found that the majority of events produced significant charge deposition in nearby pixels. Charge and energy are transported out of the pixel by charge diffusion, photoelectron range, Compton scattering, and escape of K x rays. These effects also distort single-pixel spectra, although photopeaks are still discernible at 140 keV. When signals from neighboring pixels are summed together to correct for this charge spreading, an energy resolution of 10 keV is obtained at 140 keV. Corrections will be simpler and energy resolution should be better for the 380 μm pixels of the 64×64 CdZnTe arrays we are constructing for an ultra-high-resolution brain imager.

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M3 - Paper

AN - SCOPUS:0029463198

SP - 752

EP - 756

T2 - Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3)

Y2 - 21 October 1995 through 28 October 1995

ER -

48×48 CdZnTe array with multiplexer readout

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