System and method for planning a radiation therapy treatment
US11027148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2017 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Mar 3, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1092
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system plans a radiation therapy treatment of a target volume based on inputs in the form of: a set of candidate beams (B), where each beam defines an arrangement of a therapeutic beam relative to the target volume; a treatment plan (x) for the radiation therapy treatment that uses a subset of the candidate beams (B); an objective function (F) describing a quality of the treatment plan (x); and a feasible region (X) describing requirements on the treatment plan (x) that must be fulfilled. The objective function (F) and/or the feasible region (X) also reflect a first complexity criterion (τ(x)≤{circumflex over (τ)}) limiting a first complexity measure (τ(x)) to be less than or equal to a maximum first complexity ({circumflex over (τ)}). An optimization step is executed repeatedly; whereby, in each iteration, an updated treatment plan (x′) is calculated by optimizing the treatment plan (x) with respect to the objective function (F) and the feasible region (X). Here, if a termination criterion is fulfilled, a set of selected beams (B*) is calculated based on the updated treatment plan (x′). The set of selected beams (B*) is a subset of the set of candidate beams (B). Otherwise, the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.