Peripheral tumour treatment

A method for positioning a patient treatment support within an MR-RT hybrid system, the method comprising:

• (i) positioning the patient treatment support at a central location within the MR-RT hybrid system defined to avoid collision between a patient positioned on the patient treatment support and the MR-RT hybrid system, and to align substantially a center of the patient with an isocenter of the MR-RT hybrid system;
• (ii) rotating a gantry of the MR-RT hybrid system to a gantry angle;
• (iii) moving the patient treatment support from the central location to a treatment position to align substantially a center of a patient target volume with the isocenter of the MR-RT hybrid system;
• (iv) applying a treatment beam to the patient;
• (v) returning the patient treatment support to the central location;
• and
• (vi) repeating steps (ii) to (v) for each subsequent gantry angle to which the gantry is rotated thereby to avoid collision between the MR-RT hybrid system and the patient positioned on the treatment support at each gantry angle.

A non-transitory computer readable medium having stored thereon executable instructions for positioning a treatment support upon which a patient is positioned within an MR-RT hybrid system, the instructions when executed by a processor, causing the MR-RT hybrid system to:

• (i) position the treatment support at a central location within the MR-RT hybrid system defined to avoid collision between the patient positioned on the treatment support and the MR-RT hybrid system, and to align substantially a center of the patient with an isocenter of the MR-RT hybrid system;
• (ii) rotate a gantry of the MR-RT hybrid system to a gantry angle;
• (iii) move the treatment support to a treatment position to align substantially a center of a patient target volume with the isocenter of the MR-RT hybrid system;
• (iv) apply a treatment beam to the patient;
• (v) return the treatment support to the central location;
• and
• (vi) repeat steps (ii) to (v) for each subsequent gantry angle to which the gantry is rotated thereby to avoid collision between the MR-RT hybrid system and the patient at each gantry angle.