Resolution improvement of point dose distribution in intensity modulated radiation therapy

In intensity modulated radiation therapy (IMRT), there are verification methods for the point dose distribution, such as two dimensional (2D) detector or film based verification. The 2D detector based verification is known to be easier than the film based one, however the obtained point dose distribution is lower quality. In this paper, we apply a super-resolution method to improve the image quality of point dose distribution obtained from the 2D detector. We conducted an experiment to evaluate the super-resolution images and its ideal reference images. Each dose distribution obtained by proposed method satisfied the criteria in gamma analysis. Although the failed point is slightly observed, clinical problems are probably not caused. Thus the feasibility of the proposed method is confirmed.