Correcting image distortions from a nonlinear B 1 + $$ {\boldsymbol{B}}_{\mathbf{1}}^{+} $$ -gradient field in frequency-modulated Rabi-encoded echoes.

Paul Wang,Taylor Froelich,Efraín Torres,Lance DelaBarre,Parker Jenkins,Jerahmie Radder,Michael Mullen,Michael Garwood

Magnetic resonance in medicine（2023）

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摘要

Image processing based on straightforward linear interpolation and intensity scaling, as previously applied in conventional MRI, can effectively reduce distortions in FREE images acquired with nonlinear -gradient fields.

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关键词

B1-gradient encoding,B1-nonlinearity correction,distortion correction,low-cost MRI,radiofrequency imaging,surface coil

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