3D-printed geometric distortion correction phantom for MRI
David W Holdsworth 1,2 , Matthew G Teeter 1,2 , Jaques S Milner 2 , Steven I Pollmann 2 , and Maria Drangova 2,3
Department of Surgery, Western University,
London, Ontario, Canada,
Research Institute, London, Ontario, Canada,
of Medical Biophysics, Western University, London,
Accurate correction of geometric distortion is
increasingly important for MRI applications in
image-guided intervention. Advances in 3D printing have
made it possible to fabricate structures with
three-dimensional features that facilitate automated
analysis of geometric distortions. We describe the
fabrication of a plastic structure comprised of 4.5 mm
beads, supported by 1.5 mm struts at 13 mm nominal
spacing, which is immersed in a tissue-mimicking liquid.
Automated analysis produces a point cloud of fiducial
locations and a vector map of distortion. MRI imaging at
3T demonstrates the ability to determine average local
distortions of ±0.53 mm, over a 500 ml volume.
This abstract and the presentation materials are available to members only;
a login is required.