MR imaging method and apparatus utilizing gradient and spin echo

Details MR imaging method and apparatus utilizing gradient and spin echo MR imaging method and apparatus utilizing gradient and spin echo

1995-03-29

1997-04-01

Lateef, Marvin M.

Surgery

Truss

Pad

324307, 324309, A61B 5055

Patent

active

056156766

ABSTRACT:
An MR imaging method uses NMR phenomenon, and includes a number of steps. These steps include emitting an excitation RF pulse and a plurality of refocus RF pulses to an object to generate a plurality of spin echo signals successively, and applying slice selecting gradient field pulses simultaneously with the RF pulses, respectively, for selecting slice planes. A polarity of reading gradient field pulses is switched a plurality of times to generate a plurality of gradient echo signals. A phase-encoding gradient field pulse, providing a different integrated phase encode amount, is applied to each of a plurality of echo signals generated after each of the spin echo signals is generated. The reading gradient field pulses are applied in timed relationship with generation of the spin echo signals. A pulse sequence consisting of the above steps is repeated while varying the integrated phase encode amount. Data acquired from the same group of echo signals is processed to arrange the data in one of different k spaces to reconstruct a plurality of slice images based on the k spaces, respectively.

REFERENCES:
patent: 4709212 (1987-11-01), MacFall et al.
patent: 4896113 (1990-01-01), Pelc
patent: 4901020 (1990-02-01), Ladenbeck et al.
patent: 5270654 (1993-12-01), Feinberg et al.
"GRASE (Gradient-and Spin-Echo) Imaging: A Novel Fast MRI Technique," Oshio et al., Magnetic Resonance in Medicine 20, pp. 344-349 (1991).
"Chemical-Shift Imaging with Large Magnetic Field Inhomogeneity," Kim et al., Magnetic Resonance in Medicine 4, pp. 452-460 (1987).
"Gradient-Echo Shifting in Fast MRI Techniques (GRASE Imaging) for Correction of Field Inhomogeneity Errors and Chemical Shift," David A. Feinberg et al., Journal of Magnetic Resonance, vol. 97, No. 1, Mar. 1, 1992, Orland, MN, pp. 177-183.
"Single-Shot GRASE Imaging without Fast Gradients," Koichi Oshio et al., Magnetic Resonance in Medicine, vol. 26, No. 2, Aug. 1, 1992, Duluth, MN, pp. 355-360.
"Dual Contrast GRASE (Gradient-Spin Echo) Imaging Using Mixed Bandwith," David A. Feinberg et al., Magnetic Resonance in Medicine, vol. 31, No. 4, Apr. 1, 1994, Duluth, MN, pp. 461-464.

Affiliated with

Also associated with

Rating

MR imaging method and apparatus utilizing gradient and spin echo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with MR imaging method and apparatus utilizing gradient and spin echo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MR imaging method and apparatus utilizing gradient and spin echo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-532338