High frequency radiation therapy apparatus

Claim 1

High frequency radiation therapy apparatus comprising: a couch defining a generally horizontal surface upon which a patient may lie in the prone position; a slide assembly slidably mounted on said couch immediately beneath said surface so as to be movable in the longitudinal direction thereof; high frequency generator means mounted in said slide assembly and movable therewith relative to said couch surface; wave guide means mounted as part of said slide assembly through which high frequency radiation from said generator means is delivered from beneath said surface to a patient lying thereon; said wave guide means comprising a hollow wave guide housing extending lengthwise laterally beneath said surface and having a length at least approximatey equivalent to the width of said surface, a plurality of slotted openings formed in the top of said wave guide housing facing upwardly toward the underside of said horizontal surface, said slotted openings being arranged in a plurality of groups and distributed across the width of said surface and means for selectively closing the slotted openings of each group independently of the openings of another group to block passage of radiation therethrough.