Patents Assigned to North American Scientific, Inc.
  • Publication number: 20090018383
    Abstract: A brachytherapy device may include an expandable outer cage an expandable inner cage positioned within the outer cage and configured to receive radioactive material at its perimeter. The expandable inner cage may be configured to expand, and the outer cage may be configured to expand to a variable diameter greater than the inner cage diameter so as to fill resected cavities of various diameters.
    Type: Application
    Filed: June 11, 2008
    Publication date: January 15, 2009
    Applicant: NORTH AMERICAN SCIENTIFIC, INC.
    Inventors: Mia Michelle Corcione, Darrell Drysen, Fredrick W. Wintch
  • Patent number: 7357770
    Abstract: A brachytherapy device may include an expandable outer cage, an expandable inner cage positioned within the outer cage and configured to receive radioactive material at its perimeter, and a movable actuator configured to cause the outer and inner cages to expand simultaneously in response to movement of the actuator between certain positions while maintaining a substantially constant separation distance between the outer and inner cages.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: April 15, 2008
    Assignee: North American Scientific, Inc.
    Inventors: L. Michael Cutrer, Richard A Terwilliger, Joe Wong, Fredrick Winch
  • Patent number: 6881183
    Abstract: A radioactive seed which discloses the orientation and the location of the seed when the seed is exposed to X-ray photography is provided. The seed contains multiple X-ray detectable markers which will disclose the orientation and the location of the seed when the seed is exposed to X-ray photography. The seed can also have a single marker which wraps around the external surface of the seed or wraps around a carrier body within the seed. The single marker will also disclose the orientation as well as the location of the seed.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: April 19, 2005
    Assignee: North American Scientific, Inc.
    Inventor: L. Michael Cutrer
  • Patent number: 6787786
    Abstract: The present invention relates to radiation sources and a method for producing radiation sources. Embodiments of the present invention are directed to radiation sources that can be used to calibrate nuclear imaging equipment, such as flood sources. According to embodiments of the invention, the radiation source includes a outer housing that contains a substrate upon which a radioactive pattern is deposited. The radioactive deposit may be placed on the surface of the substrate in the form of a deposited solution and may be fixed to the surface of the substrate by, for example, a binding agent and/or a sealing layer. The deposited solution may also include a colorant to visually indicate the activity distribution of the radioactive deposit.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: September 7, 2004
    Assignee: North American Scientific, Inc.
    Inventors: Dan Kalas, L. Michael Cutrer, Jack Webb
  • Patent number: 6755775
    Abstract: The present invention relates to an apparatus and method for loading radioactive brachytherapy seeds into a seed cartridge for use with an applicator. Embodiments of the apparatus according to the present invention may include a number of contact points of a size and shape designed to conform to the main body of a brachytherapy seed. The apparatus may hold the seeds until the seeds are placed within a channel of the seed cartridge, at which point the seeds may be released from the contact sites by the application of a force to the seeds or by some other mechanism. The apparatus may be made from a flexible material so that the seeds may be released by the application of a tension force. According to embodiments of the method of loading the seed cartridge, seeds in the loader may be positioned in relation to the body of the loading apparatus and the ends of the seeds may be aligned with the channel of the seed cartridge.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: June 29, 2004
    Assignee: North American Scientific, Inc.
    Inventors: Dan Kalas, David Bossi, L. Michael Cutrer
  • Publication number: 20040119030
    Abstract: The present invention relates to radiation sources and a method for producing radiation sources. Embodiments of the present invention are directed to radiation sources that can be used to calibrate nuclear imaging equipment, such as flood sources. According to embodiments of the invention, the radiation source includes a outer housing that contains a substrate upon which a radioactive pattern is deposited. The radioactive deposit may be placed on the surface of the substrate in the form of a deposited solution and may be fixed to the surface of the substrate by, for example, a binding agent and/or a sealing layer. The deposited solution may also include a colorant to visually indicate the activity distribution of the radioactive deposit.
    Type: Application
    Filed: December 8, 2003
    Publication date: June 24, 2004
    Applicant: North American Scientific, Inc.
    Inventors: Dan Kalas, L. Michael Cutrer, Jack Webb
  • Publication number: 20040087829
    Abstract: A radioactive seed which discloses the orientation and the location of the seed when the seed is exposed to X-ray photography is provided. The seed contains multiple X-ray detectable markers which will disclose the orientation and the location of the seed when the seed is exposed to X-ray photography. The seed can also have a single marker which wraps around the external surface of the seed or wraps around a carrier body within the seed. The single marker will also disclose the orientation as well as the location of the seed.
    Type: Application
    Filed: October 23, 2003
    Publication date: May 6, 2004
    Applicant: North American Scientific, Inc.
    Inventor: Michael L. Cutrer
  • Patent number: 6638207
    Abstract: A radioactive seed which discloses the orientation and the location of the seed when the seed is exposed to X-ray photography is provided. The seed contains multiple X-ray detectable markers which will disclose the orientation and the location of the seed when the seed is exposed to X-ray photography. The seed can also have a single marker which wraps around the external surface of the seed or wraps around a carrier body within the seed. The single marker will also disclose the orientation as well as the location of the seed.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: October 28, 2003
    Assignee: North American Scientific, Inc.
    Inventor: L. Michael Cutrer
  • Publication number: 20030073878
    Abstract: A radioactive seed which discloses the orientation and the location of the seed when the seed is exposed to X-ray photography is provided. The seed contains multiple X-ray detectable markers which will disclose the orientation and the location of the seed when the seed is exposed to X-ray photography. The seed can also have a single marker which wraps around the external surface of the seed or wraps around a carrier body within the seed. The single marker will also disclose the orientation as well as the location of the seed.
    Type: Application
    Filed: October 15, 2002
    Publication date: April 17, 2003
    Applicant: NORTH AMERICAN SCIENTIFIC, INC.
    Inventor: L. Michael Cutrer
  • Publication number: 20030045769
    Abstract: The present invention relates to an apparatus and method for loading radioactive brachytherapy seeds into a seed cartridge for use with an applicator. Embodiments of the apparatus according to the present invention may include a number of contact points of a size and shape designed to conform to the main body of a brachytherapy seed. The apparatus may hold the seeds until the seeds are placed within a channel of the seed cartridge, at which point the seeds may be released from the contact sites by the application of a force to the seeds or by some other mechanism. The apparatus may be made from a flexible material so that the seeds may be released by the application of a tension force. According to embodiments of the method of loading the seed cartridge, seeds in the loader may be positioned in relation to the body of the loading apparatus and the ends of the seeds may be aligned with the channel of the seed cartridge.
    Type: Application
    Filed: August 30, 2001
    Publication date: March 6, 2003
    Applicant: NORTH AMERICAN SCIENTIFIC, INC.
    Inventors: Dan Kalas, David Bossi, L. Michael Cutrer
  • Patent number: 6503186
    Abstract: A radioactive seed which discloses the orientation and the location of the seed when the seed is exposed to X-ray photography is provided. The seed contains multiple X-ray detectable markers which will disclose the orientation and the location of the seed when the seed is exposed to X-ray photography. The seed can also have a single marker which wraps around the external surface of the seed or wraps around a carrier body within the seed. The single marker will also disclose the orientation as well as the location of the seed.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: January 7, 2003
    Assignee: North American Scientific, Inc.
    Inventor: L. Michael Cutrer
  • Publication number: 20020185613
    Abstract: The present invention relates to radiation sources and a method for producing radiation sources. Embodiments of the present invention are directed to radiation sources that can be used to calibrate nuclear imaging equipment, such as flood sources. According to embodiments of the invention, the radiation source includes a outer housing that contains a substrate upon which a radioactive pattern is deposited. The radioactive deposit may be placed on the surface of the substrate in the form of a deposited solution and may be fixed to the surface of the substrate by, for example, a binding agent and/or a sealing layer. The deposited solution may also include a colorant to visually indicate the activity distribution of the radioactive deposit.
    Type: Application
    Filed: June 12, 2001
    Publication date: December 12, 2002
    Applicant: NORTH AMERICAN SCIENTIFIC, INC.
    Inventors: Dan Kalas, L. Michael Cutrer, Jack Webb
  • Patent number: 6440058
    Abstract: A system and method of treating an affected region of diseased tissue in a patient is described. A plurality of first radioactive seeds and a plurality of second radioactive seeds are implanted in the affected region. The first radioactive seeds each have one or more X-ray detectable markers providing a first X-ray detectable signature and the second radioactive seeds have one or more X-ray detectable markers providing a second X-ray detectable signature. An X-ray image of the affected region, including the first and second radioactive seeds implanted therein, provides representations of the first and second X-ray signatures which are visibly distinguishable. Representations of the first X-ray signature may then be associated with implanted seeds having a radioisotope source or dosage of the first radioactive seeds and representations of the second X-ray signature may then be associated with implanted seeds having a radioisotope source or dosage of the second radioactive seeds.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: August 27, 2002
    Assignee: North American Scientific, Inc.
    Inventor: L. Michael Cutrer