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Description
This study presents a bibliometric analysis of research trends in eye lens dosimetry for occupational exposure. A search in the Scopus database for the last two decades identified 353 articles that met our selection criteria. Bibliometric networks and trends were examined using VOSviewer to explore publication dynamics, geographic distribution, institutional collaboration, and thematic development.
The early years (2005–2011) show limited research activity. In contrast, the period from 2015 to 2021 recorded the highest number of publications. This indicates a rapid increase in research due to regulatory changes following the International Commission on Radiological Protection's (ICRP) revision of the annual eye lens dose limit from 150 mSv to 20 mSv (ICRP Publication 118). The bibliometric mapping reveals a strong European research core, with leading contributions from Greece, France, Spain and Germany. Key institutional collaborations are centered around the Greek Atomic Energy Commission (EEAE), SCK CEN, and IRSN, illustrating well established international research networks. At the country level, Japan has the largest research productivity, followed by Germany and Spain. After unifying synonyms and merging related terms, four strongly interconnected thematic clusters emerged. The primary cluster is structured around fundamental dosimetric and computational concepts. A second cluster is focused on occupational practice, confirming that fluoroscopy-guided procedures are the dominant exposure scenario. A third group emphasizes to radiation protection and dose optimization strategies. Finally, a fourth cluster emphasizes regulatory and biological aspects.
Key conclusions from the bibliometric analysis include an increase in research intensity around eye lens dose monitoring after ICRP Publication 118, as well as the identification of exposed workers through interventional procedures in radiology and cardiology as the most investigated occupational group. Despite substantial progress in occupational eye lens dosimetry, there is still a need for harmonized monitoring protocols and improved protective strategies to effectively protect exposed workers from radiation.