Radiographic apparatus

Details Radiographic apparatus Radiographic apparatus

1977-03-25

1978-10-03

Smith, Alfred E.

Radiant energy

Irradiation of objects or material

Irradiation of semiconductor devices

250416TV, 250445T, A61B 600, A61N 500

Patent

active

041186311

ABSTRACT:
In therapeutic radiographic apparatus it is desirable to maintain the penetrating radiation in passing through tissue to be irradiated, rather than surrounding healthy tissue, despite movements of the patient. A shadowgraph radiographic picture of part of the patient is obtained by derivation from cross-sectional radiographic pictures from computerized axial tomography (CAT) apparatus. A similar shadowgraph picture is obtained, during therapy treatment, by collecting the therapy radiation after passing through the body. The two pictures are compared to determine the position of the therapy radiation relative to the tissue to be irradiated and the position is adjusted in response to the comparison.

REFERENCES:
patent: 3777124 (1973-12-01), Pavkovich

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