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Abstract #3767

Development of an online distortion measurement prototype

Lumeng Cui1, Johanna Grigo2, Gerald R. Moran3, and Niranjan Venugopal4
1Division of Biomedical Engineering, University of Saskatchewan, Saskatoon, SK, Canada, 2Universitätsklinikum Erlangen, Erlangen, Germany, 3Research Collaboration Manager, Siemens Healthcare Limited, Oakville, ON, Canada, 4Department of Radiology, University of Manitoba, Winnipeg, MB, Canada

Magnetic Resonance Imaging (MRI) is increasingly essential in radiation therapy (RT) planning and so does the measurement of geometric distortion latent in MR imaging. In this work, we have developed a prototype that can accommodate any type of grid-like phantoms and provides an on-the-scanner software solution for the analysis of spatial distortion MR images. The prototype takes a prior CT scan and a new acquired MR dataset as inputs and generates a qualitative visualization and quantitative evaluation for the spatial distortion in the MRI volume. The prototype was assessed with two grid-like phantoms with good success.

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