Las dosis de radiación ionizante en tomografía computarizada (TC) tienen el potencial de generar efectos deletéreos. El tema no es trivial y la pregunta permanece en cuanto a cómo se sitúa el manejo de dosis, en concreto, en Chile. El objetivo de este trabajo es registrar y sintetizar las dosis por paciente en examen de TC en tres instituciones de salud de la Región de Valparaíso. Se realizó un estudio prospectivo descriptivo durante 3 meses, incluyendo exámenes de adultos de cabeza, tórax, abdomen y pelvis. Se recolectaron archivos DICOM asociados para extraer valores de variables relevantes. Se observaron distribuciones de dosis diferentes entre hospitales, al tener equipos y protocolos diferentes. Las medianas de CTDI (Computed Tomography Dose Index) observadas están en general dentro del rango internacional, pero con una gran proporción de exámenes que sobrepasan estos valores. Las variables de mayor relevancia en el control de la dosis fueron el número de series asociado a cada examen y la corriente de tubo. Este estudio muestra que las dosis a pacientes en estas tres instituciones son conformes a lo reportado en el ámbito internacional, con cierto espacio de mejora existente. Queda por confirmarse si estas conclusiones se pueden extender a otras instituciones y otras regiones de Chile.
Ionizing radiation doses in computed tomography (CT) have the potential to generate harmful effects. The issue is not insignificant and the question remains as to how dose management is situated, specifically, in Chile. The objective of this work is to record and summarize the doses per patient in CT examination in three health institutions in the Valparaíso Region. A prospective descriptive study was carried out over 3 months, including examinations of the head, chest, abdomen and pelvis in adults. Associated DICOM files were collected to extract values of relevant variables. Different dose distributions were observed between hospitals, as they had different equipment and protocols. The CTDI (Computed Tomography Dose Index) medians observed are generally within the international range, but with a large proportion of exams exceeding these values. The most relevant variables in dose control were the number of series associated with each exam, and the tube current. This study shows that the doses given to patients in these three institutions are consistent with what is reported internationally, with some existing room for improvement. It remains to be confirmed whether these conclusions can be extended to other institutions and other regions of Chile.
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