System and method for determining a radiation treatment plan and a radiation therapy machine

US10173076B2 · kind B2 · utility

Assignee

• RaySearch Laboratories AB · SE

Inventors

• Rasmus Bokrantz · Enebyberg, SE
• Björn Hårdemark · Stockholm, SE
• Albin FREDRIKSSON · Stockholm, SE

Key dates

• Filing date: Mar 30, 2016
• Grant date: Jan 8, 2019
• Expiry date: Mar 30, 2036

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N5/1045
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A radiation treatment plan is determined by: [1] receiving a current fluence map defining a radiation dose; [2] receiving a current control-point sequence describing machine settings for a collimator associated with a radiation source; [3] determining an updated fluence map and an updated control-point sequence based on the current fluence map; [4] determining a further updated control-point sequence based on the updated control-point sequence and the updated fluence map; [5] determining a further updated fluence map based on the updated fluence map, the updated control-point sequence and the further updated control-point sequence; [6] checking if a stopping criterion is fulfilled; if so: stopping the process, and producing an output radiation treatment plan based on the further updated control-point sequence; and otherwise: setting the further updated fluence map, or zero, to the current fluence map; setting the further updated control-point sequence to the current control-point sequence; and returning to step [3].