Motion correction for CT using marker projections
US8055049B2 · kind B2 · utility
18Cited by
12References
31Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 17, 2008 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Sep 7, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/4405
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of correcting for motion of a patient during a CT scan includes observing positions of radio-opaque markers in a series of two dimensional x-ray projections taken by a scanner. The markers are positioned on a patient in a fixed and rigid relationship, a CT scan is performed to obtain a three dimensional CT image, and an actual projected position of each of the markers in each two dimensional projection is determined. A motion data set is obtained based on the actual projected positions of the plurality of the markers. A final three dimensional CT image is reconstructed employing the motion data set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.