iDQC MRI weighted by longitudinal relaxation in the rotating frame
نویسندگان
چکیده
منابع مشابه
iDQC MR Imaging with Contrast of Off-resonance Rotating-frame Spin-Lattice Relaxation
Methods In Fig. 1, the low-power rf pulse (ω1)y and frequency offset ∆ω constitute an effective spin-locking field along the z′ axis of a tilted rotating frame, with an effective frequency 2 2 1 ( ) e ω ω ω = + ∆ and a tilt angle θ = arctan(ω1/∆ω) with respect to the normal Larmor rotating frame (θ = π/2 for an on-resonance spin-locking pulse without frequency offset) [1,2]. The magnetization a...
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for the time dependence of the macoscopic magnetisation M(t) of a sample under the influence of an external field H(t) where γ =μ / Ih is the gyromagnetic ratio of the nuclei under consideration with magnetic moment μ and spin I, i, j, and k are the usual triad of unit vectors along the Cartesian axes. The external field has the form H(t) = H0k + H1(t), where H0 is strong and constant while H1 ...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2006
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.20954