Magnetic resonance imaging method
US4953554A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 4, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Mar 4, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/5673
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic resonance imaging (MRI) method imposes void planes on tissue to be imaged, which may form a grid pattern of lines which, when later imaged, produces a reference void in the image. This is especially useful in studies of the heart where the contraction and relaxation of the heart can thus be measured. Also for static tissue the method is useful for radiation therapy port planning. The grid reference or void planes are formed by a simple use of an RF pulse in conjunction with the use of a slice select gradient which provides sufficient power so that those protons in the grid are saturated so that in the later imaging step there will be significant spin echo signal difference between the grid imposed areas and the remaining regions of the tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.