Hugh T. Morgan - Highland Heights OH Gregory G. Cooley - Chardon OH Bryce G. Thornton - Concord OH Steven G. Plummer - Hudson OH
Assignee:
Picker International, Inc. - Highland Heights OH
International Classification:
G01T 1166 G01T 1161
US Classification:
25036304
Abstract:
A gamma camera system includes two or more radiation detector heads and which are mounted opposite each other to a gantry for rotation about a subject. A transmission radiation source assembly is mounted to the front face of at least one of the detectors and can be moved across the face of the detector. The source assembly includes a radiation attenuating housing, a leaded bronze source holder, and a radionuclide source. The radionuclide source is retained in a longitudinal groove disposed in the source holder. The source holder may be rotated into open, closed, and access positions. The transmission radiation emitted by the source assembly is directed across the examination region, attenuated by the subject, and detected by the opposed detector. The gamma camera system also includes a filter which selectively attenuates the transmission radiation based on the attenuation profile of the object so as to prevent saturation of the opposed detector. An image representation is reconstructed using the radiation emitted by the subject and corrected in accordance with the transmitted radiation data.
Hugh T. Morgan - Highland Heights OH Gregory G. Cooley - Chardon OH Bryce G. Thornton - Concord OH Steven J. Plummer - Hudson OH
Assignee:
Picker International, Inc. - Cleveland OH
International Classification:
G01T 1166
US Classification:
25036304
Abstract:
A gamma camera system includes two or more radiation detector heads and which are mounted opposite each other to a gantry for rotation about a subject. A transmission radiation source assembly is mounted to the front face of at least one of the detectors and can be moved across the face of the detector. The source assembly includes a radiation attenuating housing, a leaded bronze source holder, and a radionuclide source. The radionuclide source is retained in a longitudinal groove disposed in the source holder. The source holder may be rotated into open, closed, and access positions. The transmission radiation emitted by the source assembly is directed across the examination region, attenuated by the subject, and detected by the opposed detector. The gamma camera system also includes a filter which selectively attenuates the transmission radiation to obtain a desired attenuation profile which prevents saturation of the opposed detector. The filter includes at least one layer of radiation attenuating material of uniform thickness but varying in width in a direction substantially parallel to a direction of motion of the source assembly.
UW Health ClinicsUniversity Of Wisconsin Health Radiation Oncology 600 Highland Ave, Madison, WI 53792 6082638500 (phone), 6082639167 (fax)
Green Bay RadiologyGreen Bay Radiology SC 835 S Van Buren St, Green Bay, WI 54301 9203364096 (phone), 9203368093 (fax)
Education:
Medical School Medical College of Wisconsin School of Medicine Graduated: 1987
Languages:
English
Description:
Dr. Cooley graduated from the Medical College of Wisconsin School of Medicine in 1987. He works in Madison, WI and 1 other location and specializes in Radiation Oncology. Dr. Cooley is affiliated with Aspirus Riverview Hospital & Clinics, Bay Area Medical Center, Beloit Memorial Hospital, Hospital Sisters Health System St Nicholas Hospital, St Vincent Hospital and University Of Wisconsin