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Abstract #1558

Quantification of Sequence Parameter Effect on Geometric Distortions Caused by a Titanium Brachytherapy Applicator

Steven M Shea 1 , Abbie Diak 2 , Murat Surucu 2 , Matthew Harkenrider 2 , and Joseph M Yacoub 1

1 Radiology, Loyola University Chicago, Maywood, IL, United States, 2 Radiation Oncology, Loyola University Chicago, Maywood, IL, United States

The use of MRI for cervical brachytherapy treatment planning is growing in popularity but geometric distortions from titanium applicators cause errors and uncertainty for treatment planning. Phantom experiments were performed to investigate sequence parameter variants from a standard 2D T2w turbo spin echo sequence. Quantitative measurements at the tip of the applicator showed that changes to readout bandwidth, even at the expense of increasing voxel size, can reduce artifacts while maintaining SNR and a reasonable imaging time.

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