Method and device for IMAT using orthogonal double layer multi leaves collimators
US12161882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2019 |
| Grant date | Dec 10, 2024 |
| Priority date | — |
| Expiry date | Oct 14, 2040 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1034
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides a method and device for IMAT using orthogonal double layer multi leaves collimators. The method includes: discretizing the rotating arc into multiple equally spaced fields; using the conjugate gradient method to calculate the field intensity matrix; using the double-layer grating static segmentation algorithm to calculate the subfields of each field to obtain the first predetermined number of subfields with the largest contribution to the field of each field; selecting two subfields with similar shapes from the first predetermined number of subfields with the largest contribution, distributing them to the arc of rotation, and performing interpolation to obtain discrete subfields; calculating deposition Matrix; iterative calculation of the shape and weight of subfield; using Monte Carlo dose algorithm to calculate the intensity-modulated dose distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.