Orthogonal double-layer grating dynamic intensity modulation segmentation method based on quadrant
US12226656B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2020 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Jun 24, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/1047
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention discloses an orthogonal dual-layer grating dynamic intensity modulation segmentation method based on quadrant, specifically include the following steps: S1: the fluence distribution under each beam is calculated through the radiation treatment planning system; S2: use orthogonal double-layer collimator for fluence segmentation; S3: divide the quadrant, divide the field surrounded by the upper, lower, left and right leaves into at least two quadrants, to obtain the fluence distribution and the corresponding leaf sequence of each quadrant; S4: perform regional planning of the fluence in each quadrant to obtain multiple different regions and determine the segmentation mode of different regions; S5: for any quadrant, use two mutually orthogonal leaf groups for segmentation. The present invention completes the dynamic segmentation of any shape target area and multiple target areas through the mutual cooperative movement of the upper and lower layers of orthogonal leaves, realizes the dynamic segmentation of the upper and lower layers of the orthogonal dual-layer collimator from two directions, avoids the end surface perspective between the leaves, and improves the segmenta…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.