Auxiliary collimating device for obtaining irradiation fields of

Details Auxiliary collimating device for obtaining irradiation fields of Auxiliary collimating device for obtaining irradiation fields of

1974-04-05

1976-03-16

Lawrence, James W.

Radiant energy

Radiation controlling means

250514, A61N 510, G21K 104

Patent

active

039448363

ABSTRACT:
An auxiliary collimator is added to the main collimator of a radiotherapy apparatus and comprises a master-container filled with mercury and a localising container containing a block of non absorbent material having a predetermined shape; means being provided for automatically positioning these containers with respect to the main collimator and for allowing the mercury to enter the localising container when once it has taken its working position.

REFERENCES:
patent: 2871367 (1959-01-01), Gournay
patent: 3114043 (1963-12-01), Thomas et al.
patent: 3805081 (1974-04-01), Barthel et al.

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