Measurement of geometric distortion in MRI images

Electricity: measuring and testing – Particle precession resonance – Spectrometer components

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

324308, 324300, G01R 3320

Patent

active

055459951

ABSTRACT:
A calibration procedure for correcting geometric errors in MRI images due to gradient field non-linearities and magnetic field inhomogeneities includes performing a 3D scan on a calibration phantom. The calibration phantom contains an array of tapered rods that produce an array of spots in reconstructed slice images. Spot sizes and positions enable position errors to be measured throughout the bore of the imaging system. Corrective coefficients are produced from these 3D error measurements that enable subsequent patient images to be corrected for warping errors in object position.

REFERENCES:
patent: 4591789 (1986-05-01), Glover et al.
patent: 4613819 (1986-09-01), Chui
patent: 4672320 (1987-06-01), Sekihara et al.
patent: 4777442 (1988-10-01), Rosenthal
patent: 4791369 (1988-12-01), Yamamoto et al.
patent: 4818943 (1989-04-01), Chandra
patent: 4888555 (1989-12-01), Vaughan et al.
patent: 5070876 (1991-12-01), Wright
patent: 5165050 (1992-11-01), Goodenough et al.
patent: 5351006 (1994-09-01), Sumanaweera et al.
patent: 5432449 (1995-07-01), Ferut et al.
Analysis of Machine-Dependent and Object-induced Geometric Distortion in 2DFT MR Imaging, Magnetic Resonance Imaging, vol. 10, pp. 597-608, 1992, C. J. G. Bakker, et al.
Quantifying MRI Geometric Distortion in Tissue, MRM 31:40-47 1994, Sumanaweera, et al.
Correction of Spatial Distortion in MR Imaging: A Prerequisite for Accurate Stereotaxy, Jour. of Comp. Assis. Tomog., 11(3):499-505, May/Jun. 1987, L. Schad, et al.
Validation of a New Method for Stereotactic Localization using MR Imaging, Jour. of Comp. Assis. Tomog., 15(2):291-296, Mar./Apr. 1991, J. Rousseau, et al.
Theoretical and Experimental Analysis of Geometric Distortions in MRI Imaging, First Meeting SMR, Mar./1994, J. Bertolina, et al.
Increasing Stereotaxic Accuracy With High Readout Gradient Sequences, First Meeting SMR, Mar./1994, J. Bertolina, et al.

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

Measurement of geometric distortion in MRI images does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Measurement of geometric distortion in MRI images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of geometric distortion in MRI images will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1050848

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