Abstract
Parallel Magnetic Resonance imaging (pMRI) is an image acceleration technique which takes advantage of localized sensitivities of multiple receivers. In this letter, we show that metamaterial lenses based on capacitively-loaded rings can provide higher localization of coil sensitivities compared to conventional loop designs. Several lens designs are systematically analyzed in order to find the structure providing higher signal-to-noise-ratio. The magnetoinductive (MI) lens has been found to be the optimum structure and an experiment is developed to show it. The ability of the MI lens for pMRI is investigated by means of the parameter known in the MRI community as g-Factor.
Highlights
Paper published as part of the special topic on Chemical Physics, Energy, Fluids and Plasmas, Materials Science and Mathematical Physics
In Magnetic Resonance Imaging (MRI), MR images are acquired by measuring radiofrequency (RF) magnetic fields in the MHz range inside a relatively narrow bandwidth of a few tens of kilohertz
Image acceleration in MRI is achieved by means of techniques known in general as parallel MRI.[14,15,16] pMRI works by taking advantage of the spatially sensitive information inherent in a receiving array of multiple surface coils in order to partially replace time-consuming spatial encoding
Summary
Paper published as part of the special topic on Chemical Physics, Energy, Fluids and Plasmas, Materials Science and Mathematical Physics. It is worth to mention for the discussion, that overlapping of the field of view (FOV) of adjacent coils in the array degrades the SNR of the image in the overlapping region due to the less sensitivity variations between the coils.[16] This overlapping can be quantitatively estimated by means of the g–factor.
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