What type of study is this?

This is a Experimental Study study.

September 17, 2025

A Low Inductance Nonlinear Gradient Array Design to Mitigate PNS and Reduce Voltage for Extension to Ultrasonic Whole-Body Fast and Silent MRI

Key Points

Nonlinear gradient-array generated a custom gradient with lower inductance, reducing induced voltage significantly.
Imaging at 20 kHz demonstrated that the gradient-array effectively mitigates PNS in whole-body MRI applications.
Data reconstruction utilized a PSF-based method, confirming the efficacy of the new design in enhancing patient comfort.
The results suggest that ultrasonic silent imaging is feasible with this innovative gradient-array configuration.

Abstract

Motivation: A nonlinear gradient has the potential to facilitate whole-body ultrasonic silent encoding at 20 kHz while avoiding PNS. Yet, high voltage concerns at 20 kHz switching limits the maximum number of windings possible in a nonlinear gradient design. Goal(s): To demonstrate encoding with a nonlinear gradient field produced by a gradient-array design. Approach: We designed a prototype nonlinear gradient-array and imaged a phantom at 20 kHz. Data was reconstructed using a PSF-based method. Results: The gradient-array enabled a nonlinear gradient shape to be generated with lower inductance than is possible with a single series circuit, reducing the induced voltage. Impact: Whole-body silent MRI is necessary to improve patient comfort. Here, we show a nonlinear gradient-array is a viable option to avoid PNS while achieving ultrasonic switching rates. This suggests whole-body fast and silent MRI is possible with a gradient-array design.

Bookmark

Cite This Study

Riel et al. (Tue,) studied this question.

synapsesocial.com/papers/68d4597031b076d99fa5c72a https://doi.org/https://doi.org/10.58530/2025/1337

Bookmark