Apparatus and method of acquiring physiological gating signals for magnetic resonance imaging of moving objects
US4712560A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1985 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Aug 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/5676
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method are disclosed which provide signals corresponding to physiological motion of an imaging slice in an MR system for use in synchronizing acquisition of MR data with movement of the slice. The signals are generated by initiating an incident signal of a frequency .omega. which interacts with the imaging slice and returns a reflected signal of a frequency .omega.. By mixing the incident and reflected signal, a baseband signal is generated which is indicative of changes in the phase and magnitude relationships between the signals. Because changes in the phase and magnitude relationships between the signals are related in an approximately linear manner to movement of the imaging slice, the baseband signal provides an indication of movement of the imaging slice of sufficient quality to serve as an accurate triggering signal to synchronize acquistion of MR data with movement of the imaging slice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.