Abstract #2328

Respiratory motion characterization and motion uncertainty estimation using a fast 3D+t MRI and bootstrapping for abdominal radiotherapy

Oi Lei Wong¹, Jing Yuan¹, Yihang Zhou¹, Siu Ki Yu¹, and Kin Yin Cheung¹

¹Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong

Respiratory motion characterization and uncertainty estimation is important in radiotherapy treatment planning, and is hindered by the imaging capability of 4DCT or time-resolved single/multi-slice MRI (2D+t). In this study, characterization of the positional and orientation uncertainty of abdominal organ respiratory motion, extracted from the time-resolved volumetric 3D+t MRI, was done using bootstrapping and tensor analysis.

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