Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1998-02-04
2000-05-09
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
2505031, G01T 1166
Patent
active
060607122
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. An image representation is reconstructed using the radiation emitted by the subject and corrected in accordance with the transmitted radiation data.
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ADAC Laboratories Advertisement; Date Unknown.
U.S. application Ser. No. 08/374,977; Plummer, et al.; filed Jan. 19 1995; "Emission/Transmission Device for Use With a Dual Head Nuclear Medicine Gamma Camera With the Transmission Source Located Behind the Collimator".
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Cooley Gregory G.
Morgan Hugh T.
Plummer Steven J.
Thornton Bryce G.
Clair Eugene E.
Fry John J.
Gagliarol Albert
Gurin Timothy B.
Hannaher Constantine
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