What type of study is this?

This is a Experimental Study study.

September 17, 2025

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

Key Points

Needle localization achieved with an average error of sub-2mm within one minute, enhancing precision.
Developed a coil attached to the needle combined with a fast spatiotemporal encoding method.
Protocol specifically targets needle tracking in low-field MRI environments, addressing SNR limitations.
Further adaptation of the method could facilitate a broader range of clinical applications.

Abstract

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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