Gómez Rodríguez, FaustinoPardo Montero, JuanGago Arias, María AraceliFacultade de Física. Departamento de Física de Partículas2014-02-042014-02-042014-02-04http://hdl.handle.net/10347/9812The dosimetry of the small and intensity modulated elds employed in radiotherapy, with high dose gradients involved, is a quite demanding task. The need for reliable measurements in these beams responds not only to quality assurance requirements, but also to the legal regulations of Radiotherapy (in Spain, Real Decreto 1566/1998 sobre Criterios de Calidad en Radioterapia, and also EURATOM 97/43). The complexity of modern radiotherapy techniques led to an extensive incorporation of thorough treatment dosimetric veri cation in the hospital quality assurance programs. This veri cation, previous to the treatment, is performed in order to check that the dose distributions delivered by the radiotherapy machine match the corresponding planned dose distributions within the required tolerances. One work performed in this thesis project consists in the study of di erent commercial detector arrays, devices widely employed for dosimetric treatment veri cation. The response of the detectors involved in these devices is determined in order to study the impact of the detector size, technology and layout on the measurement of intensity modulated dose distributions. The capabilities of detector arrays for the detection of uence variations is also studied, as this is one of the main objectives of treatment verication.engEsta obra atópase baixo unha licenza internacional Creative Commons BY-NC-ND 4.0. Calquera forma de reprodución, distribución, comunicación pública ou transformación desta obra non incluída na licenza Creative Commons BY-NC-ND 4.0 só pode ser realizada coa autorización expresa dos titulares, salvo excepción prevista pola lei. Pode acceder Vde. ao texto completo da licenza nesta ligazón: https://creativecommons.org/licenses/by-nc-nd/4.0/deed.glhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.glDosimetryExternal RadiotherapyNonstandard eldsMaterias::Investigación::22 Física::2212 Física teórica::221202 Partículas elementalesdoctoral thesisopen access