[2E01-04] Radiation Medicine 1

[2E02] Optical flow and Principal Components Analysis combination for tumor motion analysis during X-ray radiotherapy

*Michel POHL¹, Kazuyuki Demachi¹, Ritu Bhusal Chhatkuli¹, Kanabu Nawa², Akihiro Haga³, Mitsuru Uesaka¹ (1. Graduate School of Engineering, The University of Tokyo, 2. Department of Radiology, The University of Tokyo Hospital, 3. Graduate School of Biomedical sciences, Department of Medical Image Informatics, Tokushima University)

Keywords:Lung cancer, Optical flow, Principal Components Analysis, Radiotherapy

During lung cancer treatment with radiotherapy, positioning the X-ray beam correctly to minimize damage to healthy tissues is difficult because of the tumor motion due to breathing. The combination of optical flow and Principal Components Analysis on a clinical video enables to decompose the motion of the patient’s lungs into main trajectories, which can be used to reconstruct the initial image sequence.