Electron accelerator for radio therapy apparatus

Details Electron accelerator for radio therapy apparatus Electron accelerator for radio therapy apparatus

H - Electricity

05

G

326/2, 358/26

H05G 1/00 (2006.01) A61N 5/10 (2006.01) G21K 1/02 (2006.01)

Patent

CA 1145863

ABSTRACT The invention relates to radio therapy apparatus comprising an electron accelerator having a target and a collimator for limiting the X-ray cone. In the use of such electron accelerators, the radiation load of the patient is increased in an undesirable manner by neutrons in addition to the therapeutically desired roentgen quanta. To reduce the neutron level the invention provides that the edge zone of the collimator facing the target is made of a material of low effective cross-section for (gamma, n) processes. The dimension of this edge zone material approximately corresponds to the half-value depth of the X-radiation in this material.

355219

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