Field splitting for intensity modulated fields of large size
US7142635B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2005 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Apr 8, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/1036
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of delivering intensity modulated radiation therapy (IMRT) is disclosed. An intensity profile for the treatment of a patient is provided which spans a prescribed field width and includes a discrete profile having intensity values at each of a plurality of sample points bounded by the prescribed width. The prescribed width is compared to a maximum field width provided by the radiation treatment system. The intensity profile is split into a plurality of intensity profile portions, each having respective widths less than the maximum width if the prescribed width is greater than the maximum width. The prescribed field is also divided into a plurality of different profile portion split arrangements. A monitor unit (MU) efficiency is calculated for each of the arrangements. One of the arrangements is selected for delivery by the system using a leaf sequencing method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.