System and method for dose guidance and repeated estimation of final delivered radiation dose for a radiotherapy system

A method for a dose guidance for a radiotherapy system during a radiotherapy session, comprising the steps:

• performing substantially a real-time dose reconstruction to obtain a delivered radiation dose generated by a radiotherapy beam of the radiotherapy system in at least one volume;
• repeatedly estimating a remaining radiation dose of the radiotherapy session based on an observed and/or a simulated motion of the at least one volume;
• repeatedly estimating a final delivered radiation dose for the radiotherapy session as a sum of the delivered radiation dose and the estimated remaining radiation dose of the radiotherapy session;
• providing a dose guidance for a remaining part of the radiotherapy session based on the estimated final delivered radiation dose for the radiotherapy session;
• and
• calculating gating of the radiotherapy beam during the radiotherapy session based on the delivered radiation dose and the observed and/or the simulated motion of the at least one volume.

A decision support system for a radiotherapy system comprising:

• an interface for receiving radiotherapy beam parameters and/or parameters related to an observed and/or a simulated motion of at least one volume;
• and
• a processing unit configured to:
• perform a substantially real-time dose reconstruction to obtain a delivered radiation dose generated by a radiotherapy beam of the radiotherapy system in at least one volume;
• repeatedly estimate a remaining radiation dose of a radiotherapy session based on the observed and/or the simulated motion of the at least one volume;
• repeatedly estimate a final delivered radiation dose for the radiotherapy session as a sum of the delivered radiation dose and the estimated remaining radiation dose of the radiotherapy session;
• and
• calculate gating of the radiotherapy beam during the radiotherapy session based on the delivered radiation dose and the observed and/or the simulated motion of the at least one volume.

A decision support system for a radiotherapy system comprising:

• an interface for receiving radiotherapy beam parameters and/or parameters related to an observed and/or a simulated motion of at least one volume;
• and
• a processing unit configured to:
• perform a substantially real-time dose reconstruction to obtain a delivered radiation dose generated by a radiotherapy beam of the radiotherapy system in at least one volume;
• repeatedly estimate a remaining radiation dose of a radiotherapy session based on the observed and/or the simulated motion of the at least one volume;
• repeatedly estimate a final delivered radiation dose for the radiotherapy session as a sum of the delivered radiation dose and the estimated remaining radiation dose of the radiotherapy session;
• and
• calculate a re-positioning of an object exposed to the radiotherapy beam and/or re-positioning of the radiotherapy beam for improving the estimated remaining radiation dose of the radiotherapy session based on the delivered radiation dose and the observed and/or the simulated motion of the at least one volume.

A decision support system for a radiotherapy system comprising:

• an interface for receiving radiotherapy beam parameters and/or parameters related to an observed and/or a simulated motion of at least one volume;
• and
• a processing unit configured to:
• perform a substantially real-time dose reconstruction to obtain a delivered radiation dose generated by a radiotherapy beam of the radiotherapy system in at least one volume;
• repeatedly estimate a remaining radiation dose of a radiotherapy session based on the observed and/or the simulated motion of the at least one volume;
• repeatedly estimate a final delivered radiation dose for the radiotherapy session as a sum of the delivered radiation dose and the estimated remaining radiation dose of the radiotherapy session;
• and
• re-estimate the remaining radiation dose for an emulated re-positioning of an object exposed to the radiotherapy beam.