Method of mapping proton transverse relaxation time constants or functions thereof in a target subject to localised movement using nuclear magnetic resonance imaging
US6605943B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2002 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Feb 25, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56509
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of generating a map or distribution of parameters that are a function of proton transverse relaxation time (T2) constant in a target subject to localised movement (such as in abdominal tissue) by using nuclear magnetic resonance imaging. The method compensates for localised movement, (e.g. breathing artefacts) in the imaging by spatial neighboring averaging of image intensities over a region of interest subject to the localised movement. A map or distribution of T2 parameters is then calculated over the entire region of interest. To ensure accuracy and position of the T2 values, the effects of signal level off set, instrumental drift, and noise level is incorporated into the calculations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.