Dose assessment in Computed Tomography based on Monte Carlo simulation for a 320 detector-row cone-beam scanner

Identificador:  TDX:2594

Handle: https://hdl.handle.net/20.500.11797/TDX2594

Autors:  Cros Torrents, Maria

Resum:
Computed Tomography (CT) has become one of the imaging techniques most used in the field of diagnostic radiology. Since the introduction of the multi-slice CT scanners, a continuous process of technological evolution has made possible a new range of diagnostic applications. For this reason, there is a need to be aware about radiation exposure in current scanners and current acquisition protocols in order to optimize the clinical application of CT and to minimize possible radiation-induced health effects. The motivation of this thesis was the development of a Monte Carlo (MC) simulation tool taking into account all relevant technical characteristics of the 320 detector-row cone-beam CT scanner and the latest recommendations of the ICRP with the aim of assessing doses in patients undergoing CT examinations. The four papers included in this thesis described the procedure followed to tailor the scanner model in a MC simulation program, the validation of the MC code, the use of the program for estimation of organ absorbed doses and effective doses in different CT examinations and the development of a dosimetric software tool for dose assessment and reporting. Hence, this dissertation presents a framework for an accurate dose estimates in standard patients undergoing CT examinations with a 320 detector-row cone-beam scanner.