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Abstract #2505

Reduced FOV Imaging Near Metal Using 2D Multispectral Imaging and Very Selective Outer Volume Suppression

Valentina Taviani 1 , Daniel Litwiller 2 , Kevin M. Koch 3 , and Brian A. Hargreaves 1

1 Radiology, Stanford University, Stanford, CA, United States, 2 GE Healthcare, Rochester, MN, United States, 3 Biophysics and Radiology, Medical College of Wisconsin, Milwaukee, WI, United States

Outer Volume Suppression (OVS) using high-bandwidth quadratic-phase RF pulses was used for reduced-FOV 2D Multispectral Imaging (MSI) near metal. OVS gradient reversal and a modified acquisition strategy were used to minimise unintentional saturation of off-resonance near metal. The technique was demonstrated in a phantom consisting of a metal implant embedded in agar. Clinical applications of the proposed method for spine imaging and MR-guided FUS (Focused Ultrasound Surgery) planning were presented. The ability to reduce the encoded FOV translated in shorter echo train lengths, i.e. reduced blurring, at the expense of slightly reduced SNR.

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