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The aim was to achieve a harmonized dose optimization strategy consistent with the national diagnostic reference level and achievable dose level curves established by the Finnish Radiation and Nuclear Safety Authority in paediatric chest X-ray examinations. By using a reference device and calculating conversion factors for mAs normalization, similar or almost similar optimized exposure values could be applied to a wide range of systems. The method was proven to be effective, demonstrating its potential for broader implementation. Following this preliminary optimization, device-specific optimization should continue, particularly for equipment representing newer technology that enables further dose reduction.<\/jats:p>","DOI":"10.1093\/rpd\/ncaf116","type":"journal-article","created":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T11:50:46Z","timestamp":1758628246000},"page":"259-267","source":"Crossref","is-referenced-by-count":0,"title":["Preliminary optimization of paediatric chest X-ray examinations across a fleet of devices"],"prefix":"10.1093","volume":"202","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2037-7203","authenticated-orcid":false,"given":"Anna","family":"Kelaranta","sequence":"first","affiliation":[{"name":"Suomen Terveystalo Ltd , Jaakonkatu 3A, Helsinki FI-00100 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