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Abstract #4124

Metal artifact reduction in MRI-based radiation therapy

H Michael Gach1, Stacie L Mackey2, Mo Kadbi3, Jacqueline E Zoberi1, Jose Garcia-Ramirez1, Yuan (James) Rao1, S Murty Goddu1, Perry W Grigsby1, Hiram A Gay1, Christina I Tsien1, Jiayi Huang1, and Jeff M Michalski1

1Radiation Oncology, Washington University in St Louis, St Louis, MO, United States, 2Radiation Oncology, Barnes-Jewish Hospital, St Louis, MO, United States, 3MRI, Philips Healthcare, Cleveland, OH, United States

A large percentage of patients receiving MRI simulations for radiotherapy treatment planning have metal in their bodies. Often the metal is in or near the target or organs at risk. Metal creates susceptibility artifacts that can saturate the tissue signal and distort the tissue geometry. In this case report, examples of the benefits of metal artifact reduction using slice encoding for metal artifact correction (SEMAC) are presented for patients scanned at 1.5 T. Critical regions that were obscured by artifact were restored using SEMAC, thus allowing MRI-based treatment planning.

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