OBJECTIVE: To establish standards for determining local, regional, and national Dose Reference Level in Brazil, according to clinical indication in CT procedures. JUSTIFICATION: The present work proposes the development of a pilot program to establish standards for data collection required for determination of diagnostic reference level associated to CT clinical indication. This study was implemented in accordance to the statements of the Bonn: Call for Actions for Radiological Protection and aims to improve patient safety regarding exposure to ionizing radiation in Brazil, METHODS: The methodology is characterized as an observational, cross-sectional, and multicenter study, including 15 hospitals in 8 states in Brazil, from July to September 2021. The data collection was done using specially designed Excel spreadsheets and Google Forms. Demographic and procedure-dependent information were recorded from hospital information systems. Technical and dose related information were collected from DICOM headers. These data from different brands of scanners were validated by local hospital supervisors. Samples of Structured Dose Report were verified.