Zobrazeno 1 - 10
of 17
pro vyhledávání: '"James Walter Leblanc"'
Autor:
D.E. Castleberry, Kent C. Burr, Adrian Ivan, Richard Farrell, James Walter Leblanc, Kanai S. Shah
Publikováno v:
IEEE Transactions on Nuclear Science. 51:1791-1798
We report on the evaluation of a prototype small-animal positron emission tomography (PET) detector with depth-of-interaction (DOI) encoding. The detector consisted of an 8/spl times/8 array of scintillator crystals that were read out on the top and
Autor:
James Walter Leblanc, R.A. Thompson
Publikováno v:
IEEE Transactions on Nuclear Science. 51:746-751
A three-dimensional position encoding PET detector block that employs a monolithic scintillator is investigated in simulation. The block consists of an unsegmented scintillator crystal that is coupled on up to six sides by non-position-sensitive phot
Autor:
Ronald Grazioso, Adrian Ivan, K. S. Shah, Chang Lyong Kim, Richard Farrell, Scott Stephen Zelakiewicz, David Leo McDaniel, Kent C. Burr, Jaroslaw Glodo, James Walter Leblanc, Alexander Ganin
Publikováno v:
IEEE Transactions on Nuclear Science. 50:792-796
A gamma ray detector for PET, consisting of an array of mixed lutetium oxyorthosilicate (MLS) scintillator crystals coupled to a position sensitive avalanche photodiode (PSAPD), was evaluated. The scintillator array was constructed from individual ML
Publikováno v:
IEEE Transactions on Nuclear Science. 50:1031-1035
The temporal response of CdZnTe (CZT) detectors is measured under different X-ray flux, spectra, and detector bias conditions. A comprehensive model has been developed to investigate the detector response under these conditions. The calculations have
Autor:
David K. Wehe, Scott J. Wilderman, James Walter Leblanc, J.E. Gormley, Neal H. Clinthorne, W.L. Rogers, Akira Uritani
Publikováno v:
IEEE Transactions on Nuclear Science. 44:894-898
We present a new idea to apply a parallel plate collimator to an electronically-collimated gamma camera, to reduce the complexity of image reconstruction. Back projected images obtained experimentally and using Monte Carlo simulations are shown. Usin
Autor:
Bob Senzig, Zhye Yin, Samit Kumar Basu, Richard L. Thompson, Bernhard Erich Hermann Claus, Dirk Beque, Colin Richard Wilson, Bruno De Man, Norbert J. Pelc, Peter Michael Edic, Mark Ernest Vermilyea, James Walter Leblanc, Maria Iatrou
Publikováno v:
SPIE Proceedings.
Third-generation CT architectures are approaching fundamental limits. Spatial resolution is limited by the focal spot size and the detector cell size. Temporal resolution is limited by mechanical constraints on gantry rotation speed, and alternative
Autor:
Zhye Yin, Dan Harrison, Paul Fitzgerald, Colin Richard Wilson, B. De Man, Norbert J. Pelc, Kedar Khare, Maria Iatrou, Samit Kumar Basu, Bob Senzig, James Walter Leblanc
Publikováno v:
2007 IEEE Nuclear Science Symposium Conference Record.
We present a new system architecture for X-ray computed tomography (CT). A multi-source inverse-geometry CT scanner is composed of a large distributed X-ray source with an array of discrete electron emitters and focal spots, and a high frame-rate fla
Autor:
Richard Farrell, Mickel McClish, A. Ivan, Gin-Chung Wang, Kanai S. Shah, Kent C. Burr, James Walter Leblanc
Publikováno v:
IEEE Nuclear Science Symposium Conference Record, 2005.
We describe new high-resolution depth-of-interaction (DOI) PET detector designs based on avalanche photodiodes (APDs). With the development of APDs which utilize thin drift regions to speed response time, these detectors promise improved timing perfo
Autor:
R. Farrell, Adrian Ivan, D.E. Castleberry, R.A. Thompson, K.S. Shah, James Walter Leblanc, Kent C. Burr
Publikováno v:
Scopus-Elsevier
We present an evaluation of a depth-of-interaction (DOI) encoding PET detector based on dual-end read-out of a scintillator array. One end of the scintillator array is read out using a position sensitive avalanche photodiode (PSAPD), and the other en
Publikováno v:
2003 IEEE Nuclear Science Symposium. Conference Record (IEEE Cat. No.03CH37515).
A new Monte Carlo program has been developed for the simulation of the transport of optical photons over a rough planar surface. The new simulation employs a full three-dimensional model of a rough surface and addresses some of the limitations of the