Sudden change detection in moving tumors for dynamic tracking in lung cancer radiation therapy
Sudden change detection in moving tumors for dynamic tracking in lung cancer radiation therapy
著者:
Chhatkuli Ritu Bhusal Hospital Haga Akihiro Demachi Kazuyuki
発刊日:
公開日:
anomalyLung cancerprojection imagesradiation therapytracking
概要
Image guided radiation therapy (IGRT) has played a major role in the precision of radiation therapy especially while tracking moving tumors. The IGRT units are capable of 2D planar imaging, fluoroscopy etc. As lung tumor tends to move and deform during respiration, it also undergoes a sudden phase change in motion due to sudden cough or sneezing during the treatment which leads to the treatment beam missing the target. In this study we propose an algorithm for tracking moving tumors during radiation therapy for the detection of sudden change or anomaly. In University of Tokyo Hospital, real time projection images are acquired using the XVI (X-ray volume imaging system) during the treatment. These real-time images are used for the tracking of moving tumors and the detection using the cross correlation analysis. The preliminary results states that the sudden change can be detected with significant accuracy.
