Zobrazeno 1 - 10
of 129
pro vyhledávání: '"H.B. Barber"'
Autor:
William C. J. Hunter, Hyunki Kim, Donald W. Wilson, M.J. Crawford, H.B. Barber, James M. Woolfenden, Lars R. Furenlid, T.F. Peterson, Harrison H. Barrett, B.M. Gershman
Publikováno v:
IEEE Nuclear Science Symposium conference record. Nuclear Science Symposium. 3
We have constructed a SPECT system for small animals that utilizes eight CdZnTe pixel detectors. The eight detectors are arranged in a single octagonal ring, where each views the object to be imaged through a single pinhole. Additional projections ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::140e6193702d03ddf4e506f65c7a45b7
https://pubmed.ncbi.nlm.nih.gov/26568674
https://pubmed.ncbi.nlm.nih.gov/26568674
Autor:
George A. Kastis, Todd E. Peterson, Donald W. Wilson, Harrison H. Barrett, H.B. Barber, Lars R. Furenlid
Publikováno v:
IEEE transactions on nuclear science. 51(1)
We have developed a dual-modality CT/SPECT imaging system for small-animal imaging applications. The X-ray system comprises a commercially available micro-focus X-ray tube and a CCD-based X-ray camera. X-ray transmission measurements are performed ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c7ce52ca99fea256159deab7232e510
https://pubmed.ncbi.nlm.nih.gov/26538684
https://pubmed.ncbi.nlm.nih.gov/26538684
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 428:102-112
We can greatly reduce image artifacts in our pixellated CdZnTe arrays by mapping imperfect regions with a narrow collimated beam of gamma rays. Portions of our detectors produce signals that agree well with simulations of gamma-ray interactions, but
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb0f0a35b588ccfa01a359416efe290c
https://doi.org/10.1016/s0168-9002(98)01586-1
https://doi.org/10.1016/s0168-9002(98)01586-1
Publikováno v:
Journal of Electronic Materials. 28:760-765
Optical properties of Cd0.9Zn0.1Te (CZT) were studied by variable angle spectroscopic ellipsometry (VASE). Measurements made by VASE were performed on CZT and CdTe samples in air at room temperature at multiple angles of incidence. A parametric funct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7550a7ab19d054546870e386352dd53a
https://doi.org/10.1007/s11664-999-0067-1
https://doi.org/10.1007/s11664-999-0067-1
Publikováno v:
Journal of Applied Physics. 85:647-659
The signal induced in a readout circuit connected to a pixel electrode in a semiconductor gamma-ray imaging array is calculated by solving the Laplace equation. Two approaches are presented that use Green functions in solving the boundary value probl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70cdcfdace6909bcb1c42bde4ab00287
https://doi.org/10.1063/1.369198
https://doi.org/10.1063/1.369198
Autor:
H.B. Barber, James M. Woolfenden, E.T. Young, K.J. Matherson, D.G. Marks, F.L. Augustine, Eustace L. Dereniak, Harrison H. Barrett, J.D. Eskin
Publikováno v:
IEEE Transactions on Nuclear Science. 45:354-358
Previous efforts by our group have demonstrated the potential of hybrid semiconductor detector arrays for use in gamma-ray imaging applications. In this paper, we describe progress in the development of a prototype imaging system consisting of a 64/s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74618a647f71d2d74003413243ac6890
https://doi.org/10.1109/23.682407
https://doi.org/10.1109/23.682407
Autor:
F.L. Augustine, F. P. Doty, B.A. Apotovsky, J.D. Eskin, E.T. Young, H.B. Barber, James M. Woolfenden, K.J. Matherson, Harrison H. Barrett, Eustace L. Dereniak, W. J. Hamilton, J. P. Garcia, D.G. Marks
Publikováno v:
Journal of Electronic Materials. 26:765-772
Previous work has shown that hybrid semiconductor detector arrays similar to those used in infrared focal-plane arrays are very attractive for use in nuclear medicine and other gamma-ray imaging applications. In this paper, we describe the developmen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2bc26fb2b6143e5fbd11123c2054dbd
https://doi.org/10.1007/s11664-997-0229-y
https://doi.org/10.1007/s11664-997-0229-y
Autor:
Jack F. Butler, D.G. Marks, J.E. Venzon, Eustace L. Dereniak, Harrison H. Barrett, B.A. Apotovsky, H.B. Barber, James M. Woolfenden, W. J. Hamilton, K.J. Matherson, E.T. Young, F.L. Augustine, J.D. Eskin, F.P. Doty
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 380:262-265
We report on the construction and initial testing of a 48 × 48 CdZnTe array with 125 μm pixel spacing and multiplexer readout. Large portions of the array function well but there was a loss of pixels near one corner of the array due to non-intercon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34087fa2851f1fe42675d6c7bf100700
https://doi.org/10.1016/s0168-9002(96)00472-x
https://doi.org/10.1016/s0168-9002(96)00472-x
Autor:
H.B. Barber, James M. Woolfenden, B.A. Apotovsky, K.J. Matherson, F.L. Augustine, D.G. Marks, Harrison H. Barrett, W.J. Hamiltons, J.E. Venzon, F.P. Dotys, Eustace L. Dereniak, J.D. Eskin, E.T. Young
Publikováno v:
IEEE Transactions on Nuclear Science. 43:1253-1259
We report results of gamma-ray imaging and energy-resolution tests of a 48/spl times/48 CdZnTe array. Our detectors have 125 /spl mu/m square pixel electrodes produced by photolithography and are indium-bump-bonded to a multiplexer readout circuit. U
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::560b108381902a682ce45a8a9270dfc3
https://doi.org/10.1109/23.506673
https://doi.org/10.1109/23.506673
Publikováno v:
Physical Review Letters. 75:156-159
We analyze the effects of electrode size on performance of arrays of semiconductor gamma-ray detectors, especially when there is significant charge trapping. With large electrodes, motions of holes and electrons are of equal importance, but when the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00767513489613ecfdb1a3198de8eb2f
https://doi.org/10.1103/physrevlett.75.156
https://doi.org/10.1103/physrevlett.75.156