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OPTIKS: Optimized Gradient Properties Through Timing in k-Space.

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IEEE Transactions on Medical Imaging

|December 2, 2025

Summary

This summary is machine-generated.

A new method called OPTIKS optimizes magnetic resonance imaging (MRI) gradient waveforms for faster scans. This design tool enhances speed while reducing side effects like nerve stimulation and acoustic noise.

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Area of Science:

Magnetic Resonance Imaging (MRI) Physics
Biomedical Engineering
Signal Processing

Background:

Designing MRI gradient waveforms is complex, balancing speed with physical constraints.
Existing methods may not fully optimize time-domain properties or account for multiple objectives.

Purpose of the Study:

To develop a customizable method (OPTIKS) for designing fast, trajectory-constrained gradient waveforms.
To optimize gradient waveform traversal speed and time-domain properties.

Main Methods:

OPTIKS optimizes gradient waveform traversal speed based on k-space trajectory.
It considers objectives like limiting peripheral nerve stimulation (PNS), minimizing mechanical resonance, and reducing acoustic noise.
The method is applied to various trajectories (spirals, EPI, rosettes).

Main Results:

Significant reductions in gradient coil back-electromotive force (up to 94%) and field oscillations (up to 91.1%).
Acoustic noise decreased by up to 9.22 dB.
Speed increases of up to 11.4% were achieved using PNS models.

Conclusions:

OPTIKS provides an effective, customizable approach for designing optimized MRI gradient waveforms.
The open-source implementation facilitates broader adoption and further research in faster, safer MRI acquisition.