X-ray or gamma ray systems or devices – Source – Target
Reexamination Certificate
2005-06-24
2008-10-14
Yun, Jurie (Department: 2882)
X-ray or gamma ray systems or devices
Source
Target
C378S119000
Reexamination Certificate
active
07436932
ABSTRACT:
In one example, a radiation source comprises a housing and an acceleration chamber within the housing, with a peak acceleration energy greater than the lowest neutron production threshold of tantalum. A source of charged particles is supported by the housing to emit charged particles into the acceleration chamber. A target is supported by the housing downstream of the acceleration chamber. The target consists essentially of at least one isotope having a neutron production threshold greater than the peak acceleration energy. No neutrons are therefore generated. The source may also comprise a collimator, target shielding, and/or housing shielding comprising at least one isotope having a neutron production threshold greater than the peak acceleration energy, reducing or eliminating neutron generation as compared to the prior art, as well. Systems comprising the source, methods of operation of the source, and methods of manufacture of the source are also disclosed.
REFERENCES:
patent: 4317035 (1982-02-01), Cohen et al.
patent: 5115459 (1992-05-01), Bertozzi
patent: 5124658 (1992-06-01), Adler
patent: 5874811 (1999-02-01), Finlan et al.
patent: 6009146 (1999-12-01), Adler et al.
patent: 6069936 (2000-05-01), Bjorkholm
patent: 6172463 (2001-01-01), Cutler et al.
patent: 6445766 (2002-09-01), Whitham
patent: 6463123 (2002-10-01), Korenev
patent: 6493424 (2002-12-01), Whitham
patent: 6628745 (2003-09-01), Annis et al.
patent: 6683318 (2004-01-01), Haberer et al.
patent: 2005/0077472 (2005-04-01), Korenev
patent: 2005/0218348 (2005-10-01), Fehrenbacher et al.
patent: 2005/0281383 (2005-12-01), Harding et al.
“Neutron Contamination From Medical Electron Accelerators”, National Council on Radiation Protection and Measurements, NCRP Report No. 79, 1984, pp. i-vi and 1-60.
McCall, R. C., et al., “Neutron Sources and Their Characteristics”, NBS SP, 1979, vol. 554, pp. 75-86, from Heaton, et al., ed., “Proceedings of a Conference on Neutrons from Electron Medical Accelerators”, Proceedings of a Conference held at the National Bureau of Standards, Gaithersburg, MD, Apr. 9-10, 1979.
McCall, Richard C., et al., “Improvement of linear accelerator depth-dose curves”, Med. Phys., Nov./Dec. 1978, vol. 5, No. 6, pp. 518-524.
Gozani, Tsahi, “Active Nondestructive Assay of Nuclear Materials: Principles and Applications”, United States Nuclear Regulatory Commission, Jan. 1981, pp. 173-205.
MatWeb, Oxygen-free electronic Copper, UNS C10100, http://www.matweb.com/search/SpecificMaterial.asp?bassnum=MC101A, at least as early as Dec. 28, 2004.
MatWeb, “GlidCop® AL-60 Dispersion Strengthened Copper”, http://www.matweb.com/search/SpecificMaterial.asp?bassnum=NOMG60, at least as early as Dec. 28, 2004.
Kaye Scholer LLP
Sklar Brandon N.
Varian Medical Systems Technologies, Inc.
Yun Jurie
LandOfFree
X-ray radiation sources with low neutron emissions for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with X-ray radiation sources with low neutron emissions for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray radiation sources with low neutron emissions for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3998762