A general theory of signal-to-noise ratio (SNR) in simultaneous acquisition of spatial harmonics (SMASH) imaging is presented, and the predictions of the theory are verified in imaging experiments and in numerical simulations. In a SMASH image, multiple lines of k-space are generated simultaneously through combinations of magnetic resonance signals in a radiofrequency coil array. Here, effects ...

We study the base sizes of finite quasiprimitive permutation groups twisted wreath type, which are precisely with a unique minimal normal subgroup that is also non-abelian, non-simple and regular. Every group type isomorphic to product G=Tk:P acting on its Ω=Tk, where T some non-abelian simple P transitively k={1,…,k} k⩾2. prove if G primitive Ω k, then has size 2. proportion pairs points bases...

SMASH (SiMultaneous Acquisition of Spatial Harmonics) was recently introduced as a novel rapid-imaging technique. The SMASH technique uses a partially parallel acquisition strategy, using spatial information from a radiofrequency coil array to accelerate imaging. This study constitutes the first application of SMASH to cardiac magnetic resonance imaging. The increased imaging speed provided by ...