Dual contrast fast spin echo with alternating phase-encode

Details Dual contrast fast spin echo with alternating phase-encode Dual contrast fast spin echo with alternating phase-encode

1996-07-31

2000-06-13

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01V 300

Patent

active

060753625

ABSTRACT:
After exciting magnetic resonance (60), a train of magnetic resonance echoes including echoes (70.sub.1, 70.sub.2, . . . ) is induced, e.g., with a series of refocusing pulses including pulses (72.sub.1, 72.sub.2, . . . ). The echoes are phase and frequency-encoded appropriately for generating at least first and second images (94, 98). The first image echoes are interleaved with the second image echoes, for example, odd-numbered echoes for the first image and even-numbered echoes for the second image. To select the effective first/second image echo time, the first/second image echo which follows resonance excitation by a time closest to the selected first/second image effective echo time is given the zero or minimum phase-encoding. Nearby echoes being encoded with low phase-encode angles. In this manner, the effective echo times of the first and second images are selected to have preselected relative contrasts of diagnostic interest. Typically, the effective echo times of both the first and second image is less than the time between resonance excitation and the eighth echo, even although the echo train may be 32, 64, 128, or more echoes.

REFERENCES:
patent: 5229717 (1993-07-01), Hinks
patent: 5431163 (1995-07-01), Kajiyama
patent: 5528144 (1996-06-01), Gullapalli et al.
patent: 5557204 (1996-09-01), Lenz
patent: 5652513 (1997-07-01), Liu et al.
patent: 5672970 (1997-09-01), Takai
"Two-Contrast RARE: A Fast Spin-Density and T2-Weighted Imaging Method", Higuchi, et al., JMRI vol. 1, No. 2, p. 147.
"Rapid Spin Echo Imaging (RARE) Producing Two Effective Echo Times By Sharing Views", Fram, et al., pp. 218.
"Comparing the FAISE Method with Conventional Dual-Echo Sequences", Melki, et al., JMRI 1991, 1:319-326.

Affiliated with

Also associated with

Rating

Dual contrast fast spin echo with alternating phase-encode does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual contrast fast spin echo with alternating phase-encode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual contrast fast spin echo with alternating phase-encode will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2071324