http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2006512116-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01R33-56572 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B5-055 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B5-7257 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01R33-56518 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01R33-565 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01R33-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61B5-055 |
| filingDate | 2003-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2006-04-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2006512116-A |
| titleOfInvention | Correction method for magnetic resonance imaging |
| abstract | Spatial encoding of magnetic resonance imaging (MRI) techniques is accomplished by sampling the signal as a function of time for magnetic field gradients, eg, X, Y, and Z gradients. It has been previously assumed that gradient magnets produce a linear gradient, and normal video reconstruction techniques rely on this assumption. However, to achieve high speed performance, gradient magnets may sacrifice linearity with respect to speed. This non-linearity results in distorted images, which are sufficient to give up the usefulness of MRI images for stereotactic or long-term studies. This is because accurate quantitative information is required. Disclosed are methods of correcting distortions from gradient magnetic field non-linearities, as well as distortions resulting from transitions, rotations, and / or winding / design errors in a magnetic field generating device. The method employs a spherical harmonic function of the gradient magnetic field and a fast Fourier transform to show a sufficiently corrected image without imposing an excessive burden on the computer. |
| priorityDate | 2002-12-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 19.