Assessment of MRI Geometric Distortion for Radiotherapy Planning

The study focused on developing an accessible method for assessing geometric distortion in MRI imaging used in radiotherapy planning. The research utilized two phantoms - a commercial anthropomorphic phantom and a custom-made phantom fabricated from ABS plastic. CT imaging was used as the reference standard. Distortion was assessed through linear measurements of periodic structures in a DICOM viewer, followed by statistical analysis. The study evaluated the clinical impact of distortion on radiotherapy planning and proposed a cost-effective solution for routine quality assurance in resource-limited settings.