We establish DRL values for the most important CT protocols performed at Clinica Alemana. This DRL values will be used as a guide for operators to help in the process of parameter selection when acquiring CT images. For those protocols in which we compared to available data, all our DRL values are below the published values. It must be noticed that having lower or similar DRLs values than big studies does not necessary mean that radiological practice is been done in a correct way. Image quality must have a special attention, so continuous and further studies must be done to assess different measurable ways to evaluate the clinical image quality.

Regarding the operators performance, differences were appreciated, mainly for the CT chest protocol. Further studied must be done, to establish if the differences are significant, and also some additional selection of the data needs to be done in order to make the values more comparable, for example, select only exams done in the same CT unit in patients of comparable size.

The authors of this study are part of the LatinSafe initiative for radiological protection of patients in Latinamerica, and this research was done in this context.