Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Joel Kindem"'
Autor:
Joel Kindem, Zachary M. Seeley, Stephen A. Payne, Sean O'Neal, E. L. Swanberg, Nerine J. Cherepy
Publikováno v:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXIII.
We report on a small gamma spectrometer with directional detection, based on two modules. Each module contains an array of 128 scintillator pixels coupled to reverse-biased photodiodes, an ASIC and a microcontroller. Modules communicate via USB and a
Autor:
P. R. Beck, Steven L. Hunter, B. M. Wihl, E. L. Swanberg, Nerine J. Cherepy, Stephen A. Payne, S. E. Fisher, Zachary M. Seeley, Joel Kindem
Publikováno v:
IEEE Transactions on Nuclear Science. 65:2303-2309
We have developed a handheld $\gamma $ -ray spectrometer based on 1024 pixels, $2.8\,\,\text {mm} \times 2.8\,\,\text {mm} \times 6$ mm in size, of gadolinium–yttrium–gallium–aluminum garnet (GYGAG) ((Gd,Y,Ce)3(Ga,Al)5O12) ceramic scintillator
Autor:
Stephen A. Payne, Zachary M. Seeley, E. L. Swanberg, Joel Kindem, Sean O'Neal, Nerine J. Cherepy
Publikováno v:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXI.
Inexpensive spectroscopic personal radiation detectors (SPRDs) are needed to monitor environmental radioactivity and search for sources. For gamma spectroscopy, excellent light yield, material uniformity, light yield proportionality, mechanical and e
Autor:
Michael Fiederle, Ralph B. James, S. E. Fisher, Nerine J. Cherepy, B. M. Wihl, Steven L. Hunter, Stephen A. Payne, Larry Franks, Todd Stefanik, Zachary M. Seeley, P. R. Beck, Arnold Burger, P. A. Thelin, E. L. Swanberg, Joel Kindem
Publikováno v:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX.
Gadolinium Garnet transparent ceramics doped with Ce, ((Gd,Y,Ce)3(Ga,Al)5O12), for gamma-ray spectroscopy provide high density, high light yield, high energy resolution , high Z, mechanical robustness, and they are unreactive to air and water. Gadoli
Autor:
Nerine J. Cherepy, Daniel J. Schneberk, S.A. Payne, Gary Stone, Joel Kindem, B. M. Wihl, S. Hunter, S. E. Fisher, Zachary M. Seeley, P. R. Beck, P. A. Thelin, T. Stefanik, E. L. Swanberg
Publikováno v:
2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC).
New transparent ceramic scintillators offer advantages for applications in gamma spectroscopy and X-ray imaging. For gamma spectroscopy, excellent light yield, material uniformity, light yield proportionality, mechanical and environmental ruggedness
Autor:
Larry Ahle, P. A. Thelin, Zachary M. Seeley, K. M. Figueroa, Nerine J. Cherepy, Owen B. Drury, Sean O'Neal, S.A. Payne, S. Hunter, P. R. Beck, Joel Kindem, T. Stefanik
Publikováno v:
IEEE Transactions on Nuclear Science. 60:2330-2335
Transparent polycrystalline ceramic scintillators based on the garnet structure and incorporating gadolinium for high stopping power are being developed for use in gamma spectrometers. Optimization of energy resolution for gamma spectroscopy involves
Publikováno v:
Medical Physics. 37:2796-2803
Purpose: In medical imaging, data scaling is sometimes desired to handle the system complexity, such as uniformity calibration. Since the data are usually saved in short integer, conventional data scaling will first scale the data in floating point f
Publikováno v:
Bai, Chuanyong; Maddahi, Jamshid; Kindem, Joel; Conwell, Richard; Gurley, Michael; & Old, Rex. (2009). Development and evaluation of a new fully automatic motion detection and correction technique in cardiac SPECT imaging. Journal of Nuclear Cardiology, 16(4), pp 580-589. doi: 10.1007/s12350-009-9096-7. Retrieved from: http://www.escholarship.org/uc/item/3jt5c34z
Journal of Nuclear Cardiology
Journal of Nuclear Cardiology
Background In cardiac SPECT perfusion imaging, motion correction of the data is critical to the minimization of motion introduced artifacts in the reconstructed images. Software-based (data-driven) motion correction techniques are the most convenient
Autor:
P. A. Thelin, R L Perry, Daniel J. Schneberk, P. R. Beck, Nerine J. Cherepy, S.A. Payne, B. M. Wihl, R. R. Thompson, Nicholas M. Harvey, S. E. Fisher, Zachary M. Seeley, T. Stefanik, E. L. Swanberg, Joel Kindem, S. Hunter, Gary Stone
Publikováno v:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XVII.
We report on the development of two new mechanically rugged, high light yield transparent ceramic scintillators: (1) Ce-doped Gd-garnet for gamma spectroscopy, and (2) Eu-doped Gd-Lu-bixbyite for radiography. GYGAG(Ce) garnet transparent ceramics off
Autor:
Charles L. Melcher, Hua Wei, S. Hunter, E. L. Swanberg, Joel Kindem, Zachary M. Seeley, S. E. Fisher, Nerine J. Cherepy, Larry Ahle, S.A. Payne, Y.-S. Chung, P. R. Beck, T. Stefanik
Publikováno v:
SPIE Proceedings.
Breakthrough energy resolution, R(662keV) < 4%, has been achieved with an oxide scintillator, Cerium-doped Gadolinium Yttrium Gallium Aluminum Garnet, or GYGAG(Ce). Transparent ceramic GYGAG(Ce), has a peak emission wavelength of 550 nm that is bette