Magnetic resonance imaging (MRI) with self-navigation and self-registration
US9640070B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2014 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Sep 14, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/58
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Three-dimensional (3D) projections of nuclear magnetic resonance (NMR) signals are acquired from a liver experiencing NMR in response to a 3D multi-echo non-Cartesian pulse sequence. The projections are reconstructed into two sets of images having different resolutions. Bins associated with the different positions to which the liver moves during respiration are identified in lower resolution images, and then higher resolution images are binned into the position dependent bins based on navigator data in the lower resolution images. A combined image for a bin is made from images located in the bin and then registered to a reference image. An overall combined image is made by summing the combined bin images. Quantized data for a contrast agent concentration in the liver is produced using signal intensity in the overall combined image. The quantized value may describe a liver perfusion parameter. A diagnosis may be made from the quantized value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.