Sense optimized MRI RF coil designed with a target field method

Details Sense optimized MRI RF coil designed with a target field method Sense optimized MRI RF coil designed with a target field method

2008-04-22

2008-04-22

Shrivastav, Brij (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

C029S592000, C029S602100, C029S605000

Reexamination Certificate

active

11411257

ABSTRACT:
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 SNRsensewithin a volume of interest. An analytic relationship was formulated between the SNRsenseand surface current density on the coil former. The SNR at pixel ρ in a SENSE-MR image, SNRsense,ρ, is inversely proportional to the g-factor. The g-factor was formulated in terms of the B1distribution 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 SNRsense, by minimizing (1/SNRsense) 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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