The U.S. National Institute of Standards and Technology (NIST) has unveiled an MRI scanner calibration phantom that is traceable to standardized values.
The prototype, named Phannie, was developed in collaboration with the standards committee of the International Society for Magnetic Resonance in Medicine (ISMRM).
Traceable MRI calibrations are expected to enable accurate, quantitative measurements of tumors and other disease markers that can be reproduced across many different patients, scanners, and clinics over time.
The NIST phantom is a plastic sphere about the size of a person's head, filled with water-bathed grids of 100 small plastic spheres containing various salt solutions that become magnetized in a magnetic field.
By making MRI scans of Phannie, NIST noted that users can evaluate the image contrast, resolution, and accuracy of distance and volume measurements.
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