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US 7,257,196 B2Granted
Radiotherapeutic apparatus
OwnerKevin John Brown, David Anthony Jaffrayinventors
Life of this patent
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Abstract
A radiotherapeutic apparatus employs a collimator (52) set below a radiation source (50) and is adapted to move along an arc (54) substantially centered on the radiation source (50). As it sweeps the arc, the collimator (52) is adjusted so as to define the appropriate shape of radiation beam. A continuous sweep over the patient avoids edge artefacts and localized accumulation of leakage.
Claims13
A radiotherapeutic apparatus comprising:
- a source of radiation emitting a beam of therapeutic radiation having a width, and
- a collimator comprising a plurality of moveable elements arranged to limit the beam width by a variable amount, the collimator being moveable along an arc centered substantially on the radiation source and comprising means for moving the beam in a direction transverse to the beam width including means for sweeping the beam to deliver a therapeutic dose of radiation across a two-dimensional area of a patient.
Dependencies are inferred from the claim text.