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Abstract #4263

Spatio-temporal encoding for needle tracking on an ultra low-field single-sided MRI scanner

Riwei Jin1, Maryamsadat Shokrekhodaei1, Muller De Matos Gomes1, Madavan Raja Viswanath1, Scott B King1, Ram Narayanan1, and Meredith Sadinski1
1Promaxo, Oakland, CA, United States

Synopsis

Keywords: Low-Field MRI, Prostate

Motivation: Needle tracking in MR is essential for guiding prostate biopsies and interventions but the quality and accuracy are limited by SNR and low resolution on a 65mT scanner.

Goal(s): To develop a protocol for fast needle localization for a low field, single-sided scanner.

Approach: We designed a receive coil mounted on an interventional needle and a fast, radial, cross-term spatiotemporal encoding (xSPEN) scheme for localization.

Results: Localization of prostate biopsy needles can be achieved with a sub-2mm average error in less than one minute on an ultra-low field scanner.

Impact: The method can be further adapted to guide additional clinical procedures.

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