X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1987-04-30
1988-10-25
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Specific application
Absorption
2504961, 378195, 378 68, 378 9, A61N 510
Patent
active
047808985
ABSTRACT:
An arrangement in a gamma unit, comprising a large number of radiation sources (9) mounted within a radiation shield (2) and having beam channels (6, 19) directed radially from said radiation sources toward a common focal point (F), said radiation shield comprising a space adapted to accommodate the head of a patient resting on a support.
The novel matter resides in that the radiation sources (9) and the beam channels (6, 19) directed radially therefrom toward the focal point are located, in relation to the diametrical plane through the opening to the space, within a zone extending to latitudes 30.degree.-45.degree., as seen from said diametrical plane.
REFERENCES:
Borje Larsson, Kurt Liden and Bert Sarby, "Irradiation of Small Structures through the Intact Skull", ACTA Radiological, Official Organ of the Radiological Societies of Denmark, Finland, Norway and Sweden, vol. 13, Dec. 1974, pp. 527-534.
Lars Leksell, "Stereotatic Radiosurgery", London British Medical Assoc ., Travistock Square, WC1H9JR, Reprinted from Journal of Neurology Neurosurgery and Psychiatry, vol. 46, No. 9 pp. 797-803. Sep. 1983.
Hans Dahli, Bert Sarby, "Destruction of Small Intracranial Tumurs with Co GAMMA Radiation", Physical and Technical Considerations, vol. 14, Fasc. 3, 1975 Jun., pp. 210-227.
Elekta Instrument
Fields Carolyn E.
Miller John A.
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