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Abstract #3627

A Bidirectional, Air-driven Rotational Phantom with Analytical Ground Truth for Comprehensive Phase-Contrast MRI Validation

Hannes Dillinger1, Yu Wang1, Sina Thuemmler1, and Sebastian Schmitter1
1Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany

Synopsis

Keywords: Phantoms, Flow

Motivation: Phase-contrast MRI validation requires phantoms combining easy setup, high accuracy, and analytically describable velocities - a combination rarely achieved in single devices.

Goal(s): Develop an enhanced rotational phantom for comprehensive evaluation of phase-contrast MRI sequences.

Approach: Modified existing air-driven rotating cylinder design with laser-based speed monitoring and bidirectional operation capability. Tested using PC-MRI@3T with varying bandwidth and TE settings.

Results: Quantified displacement artifacts (10% radial stretch), acceleration sensitivity (10% venc), and velocity encoding rotation (4.6°). System enables precise artifact evaluation and sequence optimization while offering potential for standardization across imaging centers.

Impact: This novel phantom enables standardized quality assessment of phase-contrast MRI sequences across imaging centers. Its (soon to be) open-source design, analytical ground truth, and quantifiable artifacts advance sequence optimization and contribute to improved clinical flow measurements.

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