Detecting consistency between radiation field and light field
US10737120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2018 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Oct 9, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1076
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Methods and devices for detecting consistency between an invisible radiation field and a visible light field are provided. In an example, the method includes: an invisible radiation field is obtained by controlling a size of an opening of a beam limiting device; a first projection image is captured by an Electron Portal Imaging Device (EPID) as a distribution map of the invisible radiation field; a visible light field is obtained by turning on a light field lamp without changing the size of the opening of the beam limiting device; a phantom is positioned at each of vertices of the visible light field; a second projection image is captured by the EPID as a vertex distribution map of the visible light field; and deviation information between the invisible radiation field and the visible light field is determined according to the distribution map of the invisible radiation field and the vertex distribution map of the visible light field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.