Evaluate Image Distortion in a Tissue-Like Medium
The Large Field MR Distortion Phantom allows the assessment of image distortion caused by B0 inhomogeneity and the nonlinearity of magnetic gradients.
Unlike air-filled phantoms, the Large Field MR Distortion Phantom is filled with liquid, making it sensitive to chemical shifts and artifacts of susceptibility, which may be additional causes of distortion encountered when encountering density differences in diagnostic MRI and radiotherapy treatment planning.
Unique, Complete and Easy to Use: The phantom features a unique 3D orthogonal grid that provides complete geometric data across the entire imaging volume. Users can fill the phantom with the AAPM-recommended TG 100 solution, or with specialized solutions for high-field MRI or unique scan sequences. Reference measurements of grid locations can be obtained via CT scanning of the phantom.
The phantom is marked for easy alignment with positioning lasers and is designed for use with 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, upload images, review reports and trend analysis, and export DICOM overlays. The software records a reference CAD or reference CT scan to the detected control points. An interpolation is then performed to generate the 3D distortion vector fields. Results can be reported in a variety of output formats, including scatter plots, 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 sets of MRI data
- Optimized control point density to bring interpolation close to linearity
- Solution based in easy-to-use cloud
- Detailed format in NEMA MS 12 standard recommendations
- Easily analyze and track multiple machines, image sequences and phantoms
- Establish specific distortion tolerance limits for different image sequences
