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Abstract #3762

Reliability of the volumetric positional probability distribution of liver tumor using volumetric 4D-MRI: effect of temporal resolution

Oi Lei Wong1, Jing Yuan1, Darren Ming Chun Poon2, Yi Hang Zhou1, Siu Ki Yu3, and Kin Yin Cheung3
1Research Department, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong, 2Comprehensive Oncology Center, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong, 3Medical Physics Department, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong

Synopsis

This study aims to evaluate the impact of temporal resolution on the positional probability distribution. Based on our results, PPV was independent of the fps setting and was most reliable at the probability of occurrence >35 - 50%. Thus, PPV is potentially useful to minimize the registration error during daily positional verification.

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