J241034 MSSA法を用いた腫瘍動体予測システムの開発  [in Japanese] J241034 Development of Prediction System for Moving tumor by MSSA for Real-time Tumor tracking Radiation Therapy  [in Japanese]

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Abstract

Currently, the area targeted by radiation therapy is wider than an actual tumor as the tumor moves during treatments Especially for a lung tumor, the radiation exposure to normal tissues is increased, as it tends to move more than other types of tumors One of the methods to reduce the exposure of normal tissues is RTRT (Real-time Tumor-tracking Radiation Therapy) In this research, we have attempted to predict the tumor motion using a prediction method called MSSA (Multi-channel Singular Spectrum Analysis) in the therapy This method reconstructs the time-series data with principal components and predicts the future data using the reconstructed data We predicted real tumor motions which were taken at Hokkaido University Hospital As a result, the errors between the predicted data and the raw data are about 1mm Also, we have developped the safety system with prediction This system is needed to stop the irradiation in case that the patient tumor moves dramatically such as cough or sneeze during a radiation therapy The result shows that the safety system can detect the unusual signal before a large movement

Journal

  • The Proceedings of Mechanical Engineering Congress, Japan

    The Proceedings of Mechanical Engineering Congress, Japan 2012(0), _J241034-1-_J241034-3, 2012

    The Japan Society of Mechanical Engineers

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