Desarrollo de un algoritmo para el cálculo de la dosis efectiva en pacientes de tomografía computarizada

Abstract

The main objective of this titling work was to develop an algorithm for the calculation of the effective dose in computed tomography patients. The algorithm developed by MatLab, based on the protocols established by the American Association of Medical Physicists by selecting two globally recognized brands such as General Electric and Siemens, also, the parameters of acquisition and reference levels that influence the effective dose that adult and pediatric patients receive when having tomographic studies on the head, chest, abdomen, and pelvis. When comparisons of effective dose reference levels with those obtained by DosisMath-S for head studies in adult patients, determining that for a minimum exploration length of 12 cm there was an effective dose that ranged from 1,36 mSv to 1,51 mSv, while for a maximum scan length of 26,35 cm the effective dose was 2,95 to 3,30 mSv. For the thorax, abdomen, and pelvis regions, the comparison performed according to the body mass, whose values show that the greater the body thickness of the patient, it has an increase in the dispersed radiation and thus there is an effective dose increase, instead, for pediatric patients, the comparison performed was in function of their age. It is concluded, that for head studies in adult patients, the values were within the recommended reference levels applying an adequate scan length, for the other regions, it shown that the body thickness of the patients influences the results. In the meantime, for pediatric studies, 100% of the calculated effective doses were within the reference levels recommended by Galanski, Nage & Stamm. We recommended keeping a dosimetric record for these patients, at the end to quantify the effective dose received by the studies.