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Abstract #3628

Design and Validation of an Anthropomorphic Fetal-Placental MRI Motion Phantom for Artifact Research

Alexander Dunn1,2,3, Siddharth Sadanand1,2,3, and Dafna Sussman1,2,3,4
1Department of Electrical, Computer and Biomedical Engineering, Toronto Metropolitan University, Toronto, ON, Canada, 2Institute for Biomedical Engineering, Science and Technology (iBEST), Toronto Metropolitan University and St. Michael’s Hospital, Toronto, ON, Canada, 3The Keenan Research Centre for Biomedical Science, St. Michael’s Hospital, Toronto, ON, Canada, 4Department of Obstetrics and Gynecology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada

Synopsis

Keywords: Phantoms, Phantoms, Fetal, Placenta, Simulation/Validation, Motion Correction

Motivation: Motion remains a challenge in fetal MRI. Testing of motion correction approaches requires pregnant volunteers. Recruitment is challenging, costly and slow, but can be addressed by using an imaging phantom.

Goal(s): We aim to develop an anatomically-accurate fetal-placental motion phantom with the goal of advancing and expediting MR fetal motion artifact research.

Approach: Tissue-mimicking materials were cast into models of the fetal body, brain, ventricles, and placenta. Our robotic actuator was used to generate motion during imaging.

Results: The phantom successfully replicated fetal anatomy while producing visible motion artifacts, demonstrating its utility as a proxy for pregnant participants.

Impact: The phantom possesses accurate anatomy and can be moved during imaging to simulate fetal body and maternal respiratory motion. This phantom can be used by researchers for the development and validation of fetal MRI sequences and motion artifact reduction techniques.

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Keywords