| 摘要 |
An MRI RF coil that is optimized for SENSE imaging is used in a method where the surface current density distribution on a coil former was calculated to maximize the SNR<SUB>sense </SUB>within a volume of interest. An analytic relationship was formulated between the SNR<SUB>sense </SUB>and surface current density on the coil former. The SNR at pixel rho in a SENSE-MR image, SNR<SUB>sense,rho</SUB>, is inversely proportional to the g-factor The g-factor was formulated in terms of the B1 distribution of the coils. By specifying the geometry of the desired coil former and using a finite element mesh, the surface current distribution was calculated to maximize the SNR<SUB>sense</SUB>, by minimizing (1/SNR<SUB>sense</SUB>) in the volume of interest using a least squares procedure. A simple two-coil array was tested and phantom images were collected. The results show that the new coil design method yielded better uniformity and SNR compared to standard coils.
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