Related Experiment Video
Updated: Jul 14, 2026
10:06
High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain
Published on: May 10, 2012
13.5K
WE-G-217A-06: Spatial Accuracy Quantification of an MR System.
K Hwang1, G McKinnon1, J Lorbiecki1
1General Electric Company, Waukesha, WI.
Medical Physics
|May 19, 2017
Summary
A new phantom and protocol accurately measure magnetic resonance imaging (MRI) spatial accuracy across the entire imaging volume. This tool enhances MR-guided therapies and aids in developing distortion correction algorithms.
Area of Science:
- Medical Imaging
- Biomedical Engineering
Background:
- Spatial accuracy is crucial for Magnetic Resonance Imaging (MRI) systems.
- Current methods may not comprehensively assess accuracy across the entire imaging volume.
Purpose of the Study:
- To develop a novel phantom and measurement protocol for quantifying the spatial accuracy of MRI systems.
- To cover the entire imaging volume of the MRI scanner.
Main Methods:
- A phantom with embedded oil capsule markers in foam was developed.
- A 3D FGRE sequence with extended FOV was used for imaging.
- Computed Tomography (CT) provided a gold standard for error calculation.
Main Results:
- The phantom and protocol were successfully executed on two MRI scanners.
- Marker detection varied, with some affected by field inhomogeneity.
- Maximum spatial errors were analyzed based on distance from the isocenter.
Conclusions:
- The developed phantom and protocol effectively verify MRI spatial accuracy.
- This verification can improve MR-guided therapies and confidence.
- Data generated may support the development of advanced distortion correction algorithms.
