As an emerging ultrafast imaging method,
spatiotemporally encoded single-shot MRI is advantageous because it can resist
off-resonance effects while retaining spatial and temporal resolutions
comparable to the classical EPI. In this work, a variable density spiral
sampling (VDSS) scheme is proposed for SPEN MRI. An optimization algorithm is
used to design the sinusoidal readout gradient waveform. A specific gridding
algorithm and non-Cartesian super-resovled reconstruction are proposed to
retrieve image. Compared to the Cartesian sampling, VDSS can
provide images with less artifacts and better spatial resolution.
