Method and apparatus of directly measuring cross-axis eddy...

Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C324S307000

Reexamination Certificate

active

07323872

ABSTRACT:
A pulse sequence is defined to acquire calibration MR data used to characterize on-axis and cross-axis eddy currents resulting from gradient pulses used to spatially encode MR data. The amplitudes and time constants of those eddy currents can then be measured and used to guide calibration of an MRI system to reduce image artifacts.

REFERENCES:
patent: 4752734 (1988-06-01), Wedeen
patent: 5770943 (1998-06-01), Zhou
patent: 6160397 (2000-12-01), Washburn et al.
patent: 6989672 (2006-01-01), Zhang
patent: 2005/0040824 (2005-02-01), Zhang
Alley, M., Gradient Characterization Using a Fourier-Transform Technique, Magn.Reson.Med. 39:581-587.
Duyn, J.H., Simple Correction Method for k-Space Trajectory Deviations in MRI, J.Magn.Reson. 132:150-153.
Onodera, T., A Method of Measuring Field-Gradient Modulation Shapes. Application to High-Speed NMR Spectroscopic Imaging, J.Phys.E:Sci.Instrum. 20:416-419.
Takahashi, A., Compensation of Multi-Dimensional Selective Excitation Pulses Using Measured k-Space Trajectories, Magn.Reson.Med. 34:446-456.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus of directly measuring cross-axis eddy... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus of directly measuring cross-axis eddy..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus of directly measuring cross-axis eddy... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2800520

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.