The Wide-Field MRI Distortion Phantom allows the assessment of image distortion caused by B0 inhomogeneity and nonlinearity of magnetic gradients.
Unlike air-filled phantoms, the Wide-Field MRI Distortion Phantom is filled with liquid, making it sensitive to chemical shifts and susceptibility artifacts, which can be additional causes of distortion encountered when encountering density differences in diagnostic MRI and radiation therapy treatment planning.
Unique, Complete, and Easy to Use: The phantom features a unique orthogonal 3D grid that provides complete geometric data across the entire image volume. Users can populate the phantom with the AAPM-recommended TG 100 solution, or with specialized solutions for high-field MRI or unique scan sequences. Reference measurements of the grid locations can be obtained through CT scanning of the phantom.
The phantom is marked for easy alignment with positioning lasers and is designed for use with both curved and flat gantry treatment tables.
Automated Distortion Analysis in MRgRT: Used with MRI grid phantoms, Distortion Check software quickly and automatically quantifies distortion in MRI images. Simply scan the phantom, load images, review reports and trend analyses, and export DICOM overlays. The software registers a reference CAD or CT scan to the detected control points. Interpolation is then performed to generate 3D distortion vector fields. Results can be reported in a variety of output formats, including scatterplots, contour plots, box-and-whisker plots for trends, and DICOM overlays that can be exported to third-party software.
Software Features:
Quickly and automatically analyze complete MRI data sets
Optimized control point density to bring interpolation close to linearity
Easy-to-use cloud-based solution
Detailed format in NEMA MS 12 standard recommendations
Easily analyze and track multiple machines, image sequences, and phantoms
Set specific distortion tolerance limits for different image sequences
