System and method for radiation treatment planning

A treatment planning system for delivering radiation therapy by a radiotherapy apparatus, the treatment planning system comprising a processor configured to:

• receive a reference objective, the reference objective representing a goal to be achieved by the radiotherapy apparatus;
• perform optimization, according to the received reference objective, to determine a set of parameters, the set of parameters relating to characteristics of radiation to be delivered by the radiotherapy apparatus, wherein performing optimization comprises:
• optimizing the set of parameters to obtain an achieved value;
• responsive to the achieved value not meeting the reference objective, obtaining a relaxed objective using the achieved value and a relaxation value, and setting the relaxed objective as a constraint;
• and
• determine a configuration of the radiotherapy apparatus using the optimized set of parameters and the relaxed objective as a constraint.

A non-transitory computer-readable medium comprising computer-executable instructions configured to cause a processor to:

• receive a reference objective, the reference objective representing a goal to be achieved by a radiotherapy system;
• and
• perform an optimization, according to the received reference objective, to determine a set of parameters, the set of parameters relating to characteristics of radiation to be delivered by the radiotherapy system, wherein performing the optimization comprises:
• optimizing the set of parameters to obtain an achieved value;
• responsive to the achieved value not meeting the reference objective, obtaining a relaxed objective using the achieved value and a relaxation value, and setting the relaxed objective as a constraint;
• and
• determine a configuration of the radiotherapy system using the optimized set of parameters and the relaxed objective as a constraint.