[Quantitative estimation of tumor size and density by computed tomography images during adaptive radiation therapy].

The purpose of this study is to demonstrate clinically available quantitative method (special program) of estimation dynamics of tumor size and physical density (g/cm3) during adaptive radiation therapy of cancer patients for any occasion of visualization of tumor borders including the cases when tumor border is not clearly visualized. It has been showed quantitative information content of this method that could be used in clinical practice.