Patent ID: 8384054

Claim:
An irradiation device for proton or ion beam therapy comprising: a radiation source ( 3 ) that comprises a cyclotron or synchrotron arranged horizontally in a first plane (E 3 ) for generating a treatment beam; a beam guiding device ( 5 ) installed downstream of the cyclotron or synchrotron, wherein the beam guiding device guides the treatment beam from the cyclotron or synchrotron into a therapy room ( 7 ); wherein the therapy room ( 7 ) is arranged in a second plane (E 1 ) located above the first plane (E 3 ), and wherein the therapy room comprises a treatment site ( 9 ) and an access ( 17 ); wherein a floor (B) of the therapy room comprises an entrance region (E) that enables the treatment beam to enter the therapy room ( 7 ) in the second plane (E 1 ), and wherein the entrance region (E) is arranged between the treatment site ( 9 ) and the access ( 17 ) in the second plane; wherein the therapy room comprises a shielding that surrounds, at least in part, the entrance region (E), and wherein the shielding is open towards the treatment site ( 9 ) in the second plane so that the access ( 17 ) is arranged on the open side of the shielding ( 33 ) that is facing away from the treatment site ( 9 ); wherein the beam guiding device ( 5 ) is configured to guide the treatment beam ( 13 ) from the first plane of the cyclotron or synchrotron into the second plane of the therapy room ( 7 ) via the entrance region (E), and wherein the treatment beam ( 13 ) is deflected between the access and the treatment site within the therapy room in such a way that the treatment beam is directed towards the treatment site ( 9 ) and in an opposite direction of the access ( 17 ); and wherein the therapy room comprises at least one labyrinth (L) positioned in the second plane, and wherein the labyrinth is laterally offset in relation to the treatment beam ( 13 ) proceeding in the therapy room ( 7 ) and laterally offset to the shielding ( 33 ).