Mechanically Powered Motion Imaging Phantoms: Proof of Concept

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Phantom Development

Background:

• Traditional motion imaging phantoms are costly, cumbersome, and difficult to deploy.
• There is a need for accessible and portable phantom solutions for motion simulation.

Purpose of the Study:

• To present a straightforward design for multi-modality motion imaging phantoms.
• To utilize stored mechanical energy for motion generation in phantoms.

Main Methods:

• Developed two phantom prototypes employing mainsprings and elastic bands for energy storage.
• Integrated a rotary motion mechanism driven by released mechanical energy.
• Imaged phantoms using Magnetic Resonance Imaging (MRI) and Ultrasound (US).
• Applied Laplacian Eigenmap for embedding image sequences and spectrogram analysis to determine angular velocity.

Main Results:

• Achieved consistent and reproducible angular velocity measurements with minimal error.
• Demonstrated the efficacy of the proposed phantom designs in capturing motion dynamics.
• Successfully derived angular velocity over time from MRI and US image sequences.

Conclusions:

• The developed motion phantom concept offers a simple and economical alternative.
• These phantoms show significant potential for widespread adoption in medical imaging research.
• The design facilitates the creation of affordable and portable motion imaging tools.