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Tagged MR imaging in a deforming phantom: photographic validation
C C Moore1, S B Reeder, E R McVeigh
1Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205.
Radiology
|March 1, 1994
Summary
Magnetic resonance (MR) image tagging accurately measures object deformation. This validated method enhances the precision of MR imaging motion estimation techniques.
Area of Science:
- Biomedical Engineering
- Medical Imaging Physics
Background:
- Quantitative assessment of tissue deformation is crucial in medical imaging.
- Cine magnetic resonance (MR) imaging tagging is a technique used to track tissue motion.
- Validation of MR tagging measurements against a precise method is necessary.
Purpose of the Study:
- To validate cine MR image tagging measurements of a deforming object.
- To compare MR tagging data with a precise photographic measurement method.
Main Methods:
- A silicone rubber phantom underwent cyclical stretching.
- Deformation was measured using cine MR imaging tagging and sequential stroboscopic photography.
- Measurements were taken over a 7-cm region with varying stretch (0% to 20%).
Main Results:
- MR imaging deformation estimates showed a standard error of 0.002 relative to photographic data.
- Photography achieved a maximum standard error of +/- 0.001.
- MR imaging had a maximum standard error of +/- 0.003, demonstrating accuracy and precision.
Conclusions:
- The MR imaging tagging method was validated against a precise photographic technique.
- The validated tagging method provides accurate and precise deformation measurements.
- This validated technique can be applied to evaluate MR imaging motion estimation techniques.