Prevention of setup errors in radiotherapy
US9511243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2013 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Dec 15, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1074
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A patient safety system (PSS) (100) uses optical tracking in a linear accelerator treatment room to prevent gross setup errors. A patient (150) undergoes a computed tomography (CT) treatment-simulation scan while a CT ball bearing (BB) is on patient's surface. The CT BB is replaced with an infrared reflective marker (IRRM) (160) before radiotherapy treatment starts. Coordinates of the CT BB relative to an isocenter of the treatment room are used as reference for tracking. The coordinate system of an optical tracking system is converted to a coordinate system of the treatment room. The PSS evaluates setup accuracy for a radiotherapy session by comparing real-time position of the single IRRM determined by the optical tracking technology with a predicted reference position, and displays results on a graphical user interface. The PSS stops radiation when a deviation between real-time coordinates and predicted coordinates of the IRRM (160) exceeds a predefined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.