NMR Diagnosis apparatus
US4374360A · kind A · utility
Inventor
Key dates
| Filing date | May 29, 1980 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | May 29, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/704
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A nuclear magnetic resonance diagnosis apparatus includes first members which generate an inhomogeneous magnetic field within which the object is placed, and second members which includes a member which is rotated mechanically within the field. A mechanical motion of the member continuously modifies the strength of the inhomogeneous magnetic field except for a sampling line on the axis of rotation. The sampling line is located to pass through the sampling point. The field strength on the sampling line is at a constant prescribed intensity. It is advantageous in actual practice to carry out the apparatus of the invention. The first members include a solenoid magnet of a supra-conductor with a central axis coinciding with the sampling line. The second members include a rotatably carried permanent magnet having a central axis of rotation on the central axis of the solenoid magnet. The magnetic field strength of predetermined magnitude or intensity occurs only at one point which is a given distance from the central point of the solenoid on the solenoid's central axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.