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Development of a rotation phantom for phase contrast MRI sequence validation and quality control
Alireza Vali1, Sebastian Schmitter2,3, Liliana Ma1,4
1Department of Radiology, Northwestern University, Chicago, Illinois, USA.
Magnetic Resonance in Medicine
|June 24, 2020
Summary
A novel rotating phantom ensures consistent velocity measurements for phase-contrast MRI (PC-MRI) quality control. This tool enables accurate error quantification and validation of PC-MRI techniques.
Area of Science:
- Medical Imaging
- Biomedical Engineering
- Fluid Dynamics
Background:
- Phase-contrast MRI (PC-MRI) is crucial for quantifying blood flow.
- Accurate velocity measurements are essential for clinical diagnosis.
- Standardized phantoms are needed for PC-MRI validation and quality control.
Purpose of the Study:
- To develop a reliable, consistent, and reproducible reference phantom.
- To enable quantitative error analysis and validation of PC-MRI.
- To establish a tool for quality control in PC-MRI.
Main Methods:
- An air-driven rotating phantom with agarose gel was designed.
- Real-time rotational speed control and measurement were implemented.
- 2D PC-MRI was used to image the phantom, comparing measured to predicted velocities.
Main Results:
- The phantom demonstrated consistent rotational speed (2 rpm SD).
- Excellent agreement between predicted and measured velocities (ICC=0.99).
- Reproducible velocity distributions were achieved in scan-rescan experiments (ICC=0.99).
Conclusions:
- The developed phantom provides reproducible linear velocity distributions.
- It is suitable for systematic and quantitative error analysis of PC-MRI.
- This phantom serves as a valuable tool for PC-MRI validation.
