Method and device for delivering radiotherapy

A device for aligning a patient for delivering a plurality of radiation beams comprising:

• a) patient support means;
• b) coarse alignment means connected to the patient support means;
• and
• c) fine alignment means connected to the patient support means.

A method of aligning a patient with a target tissue within the patient for delivering a plurality of radiation beams from a plurality of device positions comprising:

• a) providing a radiation beam delivery device having a beamline center;
• b) deriving a set of predetermined data describing the flexion behavior of a radiation beam delivery device;
• c) selecting a patient having one or more than one target tissue suitable for receiving a plurality of radiation beams;
• d) producing a treatment plan;
• e) aligning the patient with respect to the radiation beam delivery device oriented at a first device position using the derived set of predetermined data describing the flexion behavior of the radiation beam delivery device to place the target tissue within the patient at the beamline center for the first device position;
• f) delivering a first radiation beam from the first device position to the target tissue;
• g) moving the radiation beam delivery device to a second device position;
• h) compensating for flexion of the radiation beam delivery device produced by the move to the second device position using the derived set of predetermined data describing the flexion behavior of the radiation beam delivery device to place the target tissue within the patient at the beamline center for the second device position;
• and
• i) delivering a second radiation beam from the second device position to the target tissue within the patient.