Radiology technologies and medical imaging related to clinical diagnostic procedures have been rapidly developing areas of healthcare. During this PhD study the candidate will be involved in the quality assurance and quality control of diagnostic radiology procedures and the imaging quality assurance system development of the National Institute of Oncology. The goal of this PhD topic is to develop different methods of dosimetric analyses and determine the additional dose related to the different diagnostic image modalities, furthermore, to analyze the different image quality parameters for the different medical imaging equipment and to compare the dosimetric and image quality parameters of mammography, radiography and computer tomography devices. Connecting to the above topic the candidate can be involved in image reconstruction technique developments, mainly focusing on the possible accuracy gain during irradiation planning and in vivo dosimetry. This research is potentially connected to special techniques such as proton therapy or other high dose gradient treatment methods. Candidate will be involved in the IAEA Coordinate Research Projects for Advanced Tools for Quality and Dosimetry of Digital Imaging in Radiology (E24025) (https://www.iaea.org/newscenter/news/new-crp-advanced-tools-for-quality-...), through the National Institute of Oncology, especially for the investigation of the image quality of diagnostic imaging equipment.