Method for the operation of a magnetic resonance apparatus
US6573717B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2001 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Aug 3, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/055
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method for the operation of a magnetic resonance apparatus, nuclear magnetic signals obtained from an image region of an examination subject that is positioned in an imaging volume of the apparatus are entered into a k-space matrix as respective complex numbers are a motion model is determined with which translational motion of the subject with respect to the imaging volume can be described with a time-dependency, at least for prescribable points of the image region. The motion model is determined with respective phase values of at least two values of the k-space matrix that are point-symmetrically located in the k-space matrix with respect to a symmetry point of the k-space matrix. These two values behave as complex conjugates of each other in the absence of any motion between the registration times of the two values, and, any translational motion is thus reflected in the phase values. The values of the k-space matrix are corrected according to the motion model determined in this manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.