Development of Novel Image Processing System Using Super-Resolution to Reduce Cone-Beam CT Imaging Dose in Radiation Therapy.

We developed the image processing system using SISR based on CNN to reduce the CBCT imaging dose in radiation therapy. The developed system could add the high-frequency components which were not included in low matrix size CBCT images. CBCT imaging dose could be reduced to 1/16 and 1/4 when CBCT scans were taken with 128×128 and 256×256 pixels, respectively. The developed system enables CBCT imaging using a low radiation dose without degrading the image quality.