Apparatus and method for automated determination of surface coil coordinates to correct signal inhomogeneities in magnetic resonance signals
US5722410A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Jun 14, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/341
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A surface coil (26) is positioned against a subject in the image region to detect emanating radio frequency resonance signals. The detected signals are processed (52) into a magnetic resonance images representing the image region which include an image value for each of an array of pixel coordinates. There is a large change in magnitude between image values of pixels corresponding to the coil and adjacent pixels. Magnitudes and directions of pixel value change gradients are calculated (60) from the image values corresponding to pixels in each of a first set of magnetic resonance image slices representing axial and transaxial slices through the surface coil. A coordinate calculator (62) calculates image region coordinates corresponding to segments of the surface coil. From the image region coordinates of the surface coil segments, a surface coil sensitivity calculator (92) calculates coil sensitivity which is in turn used to enhance (94) the reconstructed images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.