Modular phantom and corresponding software tools to measure distortion in MRI systems.
Mariko Gardiner¹, Keith Wachowicz¹, Nicola De Zanche¹
Prototype, stable release, CERN-OHL-W license
Phantoms that cover large volumes are required to characterize geometrical distortion for image-guided interventions such as MR-guided radiation therapy (linac-MR). Liquid-filled phantoms of appropriate size can, however, be impractically heavy. This phantom uses silicone rubber spheres arranged on a three-dimensional grid, resulting in a lightweight, portable structure. Displacements of each bead relative to the known grid positions are calculated in Matlab or 3D Slicer from 3D bSSFP scans.
The repository contains:
- CAD files describing the phantom as built.
- Screenshots and photographs of the phantom and post processing tools.
- Software and other files used for processing data obtained with the phantom.
- Description on how the phantom is designed and built.
Abstract submitted to ISMRM 2022 conference
1University of Alberta and Cross Cancer Institute, Canada