Catphan®
Magphan®
Magphan® ADNI
ECTphan™
RANDO®
OEM Phantoms
RSVP Head™
RSVP Pelvis™
Phantom Patient™
Sectional Phantoms
Liqui-Phil™
Custom PhantomsMagphan® Quantitative Imaging Phantom
Precise, Comprehensive Measurement of
Volume Distortion in MR Scanners
Used in the ADNI Study
The Magphan® Quantitative Imaging Phantom was developed with physicist Richard Mallozzi, Ph.D., to provide detailed mapping of image distortion. The phantom contains an array of polycarbonate spheres. Known and scanned sphere positions are compared, yielding up to fourth-order measurements of scanner distortion.
Accurate Scanner Distortion Measurement
The Magphan® Quantitative Imaging Phantom contains 165 polycarbonate spheres filled with copper sulfate and water solutions. The spheres are mounted on a series of polycarbonate plates and posts to maintain their fixed postions within the phantom. Measurements of the phantom are compared with the known positions of the spheres to give an accurate measurement of the distortion of the scanner.
GE developed an algorithm to process phantom images to evaluate spatial characteristics of MR scanners. This method for MR spatial assessment was adopted for use in the Alzheimer's Disease Neuroimaging Initiative (ADNI) project.
For general image system perfomance testing, we offer the Magphan® Phantom.
Spatial Distortion and Image Quality Analysis Service
by Image Owl, Inc.
Since numerous groups want to apply the methodology used by the Magphan® Quantitative Imaging Phantom, there is a need for a standardized system of tracking the spatial fidelity of MRI systems.
The first priority of Image Owl is to provide a reliable, cost-effective service for comprehensive data analysis, organization, and storage for users of the phantom.
The Image Owl service provides web-based image processing, data analysis, and visualizations of distortion measurements. The database tools available offer a comprehensive picture of scanner performance over time, ideal for quality assurance programs and longitudinal studies. Additional details may be found on their website, at www.imageowl.com. (This service is purchased separately from the Magphan® Quantitative Imaging Phantom.)