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.