Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine
-
To develop a fast and accurate method for 3D T2 mapping of prostate cancer using undersampled acquisition and dictionary-based fitting. ⋯ 3D quantitative T2 mapping of the whole prostate can be achieved in 3 minutes.
-
To extract longitudinal and transverse (T1 and T2 ) relaxation maps from standard MRI methods. ⋯ Through exact sequence modeling and separate flip angle measurement, T2 and T1 may be quantified from a turbo spin-echo brain protocol with proton density, T2 , and T1 weighting.
-
Variable flip angle (VFA)-based T1 quantification techniques are highly sensitive to B1 inhomogeneities and to residual T2 dependency arising from incomplete spoiling. Here, a rapid spiral VFA acquisition scheme with high spoiling efficiency is proposed for simultaneous whole-brain B1 and T1 mapping. ⋯ Reliable simultaneous spiral VFA B1 and T1 quantification was feasible with acquisition times of <1 min for whole-brain coverage at clinically relevant resolution.
-
To develop a rapid Fourier decomposition (FD) free-breathing pulmonary 1 H MRI (FDMRI) image processing and biomarker pipeline for research use. ⋯ We developed and evaluated a pipeline that provides a rapid and precise method for FDMRI ventilation maps.
-
To demonstrate a circular EPI (CEPI) sequence as well as a generalized EPI reconstruction for fast fMRI with parallel imaging acceleration. ⋯ Nonuniform sampling and generalized image reconstructions can be applied to EPI acquisitions including those with blipped-CAIPI z gradients. The same gradients can be used for either SMS or 3D acquisitions providing identical coverage.