Non-diagnostic stereoscopic x-ray tracking of moving objects in the context of radiotherapy and radiosurgery, with time-offset image recording
US7400700B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2007 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Apr 4, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/022
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A non-diagnostic, stereoscopic x-ray tracking apparatus and method for tracking moving objects in the context of radiotherapy and radiosurgery includes using two x-ray tubes to alternately and repeatedly record x-ray images of an object along two different viewing lines through the target area of an irradiating apparatus. The viewing lines intersect at a known angle, wherein an extrapolated object trajectory is ascertained by determining surfaces and intersecting points. Further, a minimum transversal from the object trajectory onto a current viewing line is ascertained, wherein the three-dimensional position of the tracked object is approximated at the point at which the object trajectory meets the viewing line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.