Method for magnetic resonance imaging and related apparatus
US5099208A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1989 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Oct 5, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/56527
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved method and related apparatus is provided for magnetic resonance imaging with distortions due to magnetic field inhomogeneities and subject susceptibility corrected. The method includes providing a subject positioned within a main magnetic field, a source of RF signals, a receiver for receiving signals emitted from the subject responsive to the RF pulses and emitting responsive output signals, a computer for receiving the output signals from the receiver and establishing image information related thereto and a visual display for displaying images obtained from the image information. The improved method includes performing a first image generating sequence including generating a 90.degree. RF pulse while simultaneously applying a first slice selection gradient, a phase-encoding gradient and subsequently applying a first preparation gradient after which a 180.degree. refocussing pulse is generated. Subsequently a first read-out gradient is generated while the echo signal is read by the receiver. The sequences is repeated a sufficient number of times to create a first volume image. A second image generating sequence is performed which is similar to the first except that the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.