Abstract #4017

Investigation of A Fast-volumetric Four-dimensional Magnetic Resonance Imaging Technique for Abdominal Radiotherapy Tumor Motion Management

Tian Li¹, Haonan Xiao¹, Ge Ren¹, Weiwei Liu², Yibao Zhang², Hao Wu², Weihu Wang², and Jing Cai¹

¹Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, Hong Kong, ²Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Radiation Oncology, Beijing Cancer Hospital & Institute, Peking University Cancer Hospital & Institute, Beijing, China, Beijing, China

Motion management plays an important role in abdominal cancer radiotherapy. Current motion measurement method using 2D Cine MRI is inefficient. However, there is no commercial four-dimensional MRI available for motion management. In this study, we aim to investigate a fast-volumetric four-dimensional MRI technique using commercial sequence for tumor motion management in liver cancer patient. Our preliminary results shown that the commercially available TWIST-VIBE 4D-MRI sequence is capable of measuring liver tumor motion accurately with an acceptable tumor contrast.

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