Fat-water separation with alternating repetition time balanced SSFP
نویسندگان
چکیده
منابع مشابه
Wideband SSFP: alternating repetition time balanced steady state free precession with increased band spacing.
Balanced steady-state free precession (SSFP) imaging is limited by off-resonance banding artifacts, which occur with periodicity 1/TR in the frequency spectrum. A novel balanced SSFP technique for widening the band spacing in the frequency response is described. This method, called wideband SSFP, utilizes two alternating repetition times with alternating RF phase, and maintains high SNR and T(2...
متن کاملSpectral Profile Design for Multiple Repetition Time Balanced SSFP
Introduction: Balanced SSFP (bSSFP) enables rapid image acquisition with high SNR but elicits an undesirable bright fat signal. Several steady-state sequence designs permit varying degrees of spectral shaping, allowing the fat signal to be suppressed by designing a stopband centered around the lipid resonant frequency [1-3]. Previous work on multiple repetition time (multi-TR) bSSFP has often r...
متن کاملUse of Simulated Annealing for the Design of Fat-suppressed Multiple Repetition Time Balanced SSFP
Method We searched for an optimal parameter vector x = [α1 α2 α3 φ2 φ3 τ2 τ3], where αn are flip angles and φn the phase for the n RF pulse (intervals of 1°), and τn= TRn/TR1, with the range 0.05≤ τ ≤ 1.1 at intervals of 0.01 (Fig. 1). The SA algorithm used is described in [5]. The step adjustment of each parameter was adapted after every 20 iterations to maintain, as far as possible, a 1:1 rat...
متن کاملComparison of Phase-Sensitive and Alternating Repetition Time SSFP for Flow-Independent Peripheral Angiography
Introduction: Magnetic resonance angiography of the extremities can help in the diagnosis of conditions such as peripheral arterial disease and peripheral vascular occlusion. In recent work, non-contrast-enhanced high-resolution flow-independent angiograms of the hand have been acquired with SNR-efficient balanced steady-state free precession (SSFP) imaging [1]. The simple and efficient phase-s...
متن کاملEnhanced phase-sensitive SSFP reconstruction for fat-water separation in phased-array acquisitions.
PURPOSE To propose and assess a method to improve the reliability of phase-sensitive fat-water separation for phased-array balanced steady-state free precession (bSSFP) acquisitions. Phase-sensitive steady-state free precession (PS-SSFP) is an efficient fat-water separation technique that detects the phase difference between neighboring bands in the bSSFP magnetization profile. However, large s...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2008
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.21692