ArticleMagnetic resonance in medicine2016
Rapid inner-volume imaging in the steady-state with 3D selective excitation and small-tip fast recovery imaging.
Article in Magnetic resonance in medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- High-resolution metabolic mapping of the cerebellum using 2D zoom magnetic resonance spectroscopic imaging.Magnetic resonance in medicine · 2021Article
- Design of spectral-spatial phase prewinding pulses and their use in small-tip fast recovery steady-state imaging.Magnetic resonance in medicine · 2018Article
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4 authors.
Funding
Abstract
purposeDevelop a method for rapid three-dimensional inner-volume (IV), or reduced field-of-view, steady-state imaging.
methodsTailored radiofrequency pulses for exciting a three-dimensional IV were designed using a recently proposed algorithm and used in three different sequences: spoiled gradient echo, balanced steady-state free precession, and "small-tip fast recovery" (STFR) which uses a "tip-up" RF pulse after the readout to fast recover spins to the longitudinal axis. The inner- and outer-volume (OV) steady-state signals were analyzed. To demonstrate the potential utility of the proposed method, segmented stack-of-spirals reduced field-of-view images in a volunteer were acquired.
resultsFor a given three-dimensional IV excitation pulse, STFR can achieve higher IV/OV signal ratio compared with spoiled gradient echo and balanced steady-state free precession. For spoiled gradient echo and balanced steady-state free precession, this ratio is significantly lower than that produced by a single IV excitation. For STFR, this ratio exceeds that produced by a single IV excitation, due to partial OV saturation produced by the nonspatially selective tip-up pulse. Reduced FOV STFR stack-of-spirals imaging with 2-fold under-sampling in both x-y and z is demonstrated.
conclusionSTFR provides an effective mechanism for OV suppression in steady-state IV imaging. The recently proposed joint pulse design method can be used in the STFR sequence to achieve fast reduced field-of-view imaging. Magn Reson Med 76:1217-1223, 2016. © 2015 Wiley Periodicals, Inc.
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