An MRI-compatible platform for one-dimensional motion management studies in MRI.

Area of Science:

• Medical Imaging
• Biomedical Engineering

Background:

• Abdominal magnetic resonance imaging (MRI) is significantly challenged by respiratory motion.
• Clinical comparison of motion compensation strategies is hindered by inter-subject variability.

Purpose of the Study:

• To evaluate a programmable system for one-dimensional (1D) motion management in MRI research.
• To establish a foundation for developing and investigating novel motion management techniques.

Main Methods:

• Assembly and testing of a motorized linear stage system within an MRI environment.
• Assessment of electromagnetic interference between the motion platform and a whole-body MRI scanner.
• Evaluation of motion effects on image quality and quantitative measurements using organ trajectories from volunteer scans in phantom tests.

Main Results:

• No interference was observed between the motion platform and the MRI scanner.
• The system reliably produced motion across various imaging conditions.
• Physiologic motion caused a 67% decrease in T2 measurement of a kidney lesion phantom, which was partially recoverable with navigator-based motion compensation.

Conclusions:

• The developed motion platform provides reliable linear motion simulation within a whole-body MRI scanner.
• This system serves as a valuable research tool for advancing MRI motion management strategies.
• Further development can enhance motion compensation techniques for improved abdominal MRI accuracy.