X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1986-05-06
1988-10-25
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Absorption
378 5, 378 19, 378160, 2503851, G01N 2304
Patent
active
047808977
ABSTRACT:
A method and apparatus for providing dual energy radiation images of a patient in a kinestatic charge detection system utilizes first and second kinestatic charge detectors commonly connected to apparatus for rotating the detectors about a radiation source at a predetermined velocity. The detectors are adjusted such that ion drift velocity in each detector is equal in magnitude but opposite in direction to the velocity of rotation of the detectors. The radiation from the radiation source is modulated such that relatively low average energy radiation impinging on the patient is received by the first detector and relatively high average energy radiation impinging on the patient is received by the second detector. As the radiation is scanned across the patient and received by the detectors, output data from each detector provides information representative of the intensity of radiation received during the scan. The output data is then combined by a imaging system to form a difference image.
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"Kinestatic Charge Detection", by DiBianca et al., Med. Phys. 12(3), May/Jun. 1985, p. 339.
Granfors Paul R.
Keyes Gary S.
McDaniel David L.
Beusse James H.
Church Craig E.
Freeman John C.
General Electric Company
Stoner Douglas E.
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