Apipunyasopon, L., Weerapong, P., Buranawanichwong, N. and Kingkaew, S. 2020. Investigation of the dosimetric and volumetric changes using DIR method based on CT-CBCT images in nasopharynx cancer patients. Journal of Thai Association of Radiation Oncology. 26, 2 (Nov. 2020), R115–1R126.