X-ray or gamma ray systems or devices – Specific application – Fluorescence
Patent
1991-03-26
1992-04-14
Howell, Janice A.
X-ray or gamma ray systems or devices
Specific application
Fluorescence
378 19, 378 87, 378 99, G01N 23223
Patent
active
051054523
ABSTRACT:
A narrow x-ray beam is scanned through the chest cavity of a subject to create a scattered radiation signal. The scattered radiation signal is used to construct a tomographic image of the contents of the subject's chest cavity on a display screen. A crosshair on the display screen is used to mark the location of a bypass graft in the image. A computer senses the position of the crosshair and subsequently positions a fluorescence detector over the subject to interrogate the location of the bypass graft within the chest cavity. A tracer material injected into the subject fluoresces as it passes through the irradiated bypass graft. The resulting fluorescence transient is recorded and provides a measure of graft patency and flow characteristics.
REFERENCES:
patent: 2670401 (1954-02-01), Weinberg
patent: 2776377 (1957-01-01), Anger
patent: 3497691 (1970-02-01), Chen
patent: 3777142 (1973-12-01), Grenier et al.
patent: 3819256 (1989-04-01), Annis et al.
patent: 3927318 (1975-12-01), Macovski
patent: 4101774 (1978-07-01), Elzinga et al.
patent: 4229651 (1980-10-01), Danos
patent: 4294259 (1981-10-01), Picunko et al.
patent: 4480332 (1984-10-01), Strecker
patent: 4495636 (1985-01-01), Jacobs et al.
patent: 4799247 (1989-01-01), Annis et al.
patent: 4809312 (1989-02-01), Annis
patent: 4839913 (1989-01-01), Annis et al.
patent: 4974247 (1990-11-01), Friddell
patent: 5022062 (1991-06-01), Annis et al.
Clark et al., "The Use of Compton Scattered Gamma Rays for Tomography" May-Jun., 1976, pp. 225-235.
Towe et al., "X-ray Compton Imaging a High Speed Flying Spot X-ray Tube", Oct. 1981, pp. 712-721, vol. 28 (10).
Farmer et al., "A New Approach to Determination of Anatomical Cross Sections of the Body by Compton Scattering of Gamma-rays" Phys. Med. Biol., vol. 16, No. 4, pp. 577-586, 1971.
Guzzardi et al., "Recent Improvements in Compton Tomographic Imaging of the Lung and Possible Application to Object Recognition" IEEE Transaction on Nuclear Science vol. 34(3) pp. 667-671, Jun. 1987.
Lale P. G. "The Examination of Internal Tissues Using Gamma Ray Scatter with a Possible Extension to Mega Voltage Radiography" Phys. Med. Biol. vol. 4, pp. 159-167.
Palmer, et al., "Determination of Regional Myocardial Perfusion by X-ray Fluorescence" Investigative Radiology vol. 25 No. 5, pp. 486-494, May 1990.
Howell Janice A.
Wong Don
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