In parallel to the radiological monitoring of the population as a whole, IRSN continues to monitor certain cohorts (children, practitioners, etc.) for epidemiological purposes. The acquired data is fed into studies conducted both nationally and on a European level.
This is the case for the COCCINELLE cohort, relating to 19,000 children who have undergone before the age of 16 an interventional cardiology procedure aimed at diagnosing and treating a cardiovascular disease. The objective of this cohort is to assess the risk of developing a solid tumour cancer or leukaemia associated with radiological exposure during childhood, a period of particular sensitivity to ionising radiation.
The “Enfant Scanner” (“Child Scan”) cohort, established by IRSN in collaboration with around 20 university hospital centres, comprises more than 100,000 children born after 1 January 1995 and who were exposed to a first scan between 2000 and 2011. This monitoring is being continued in order to provide sufficient statistical power to be able to confirm certain preliminary results suggesting an increased risk of certain cancers associated with the dosage.
For several years, IRSN has also been conducting a study, entitled O’CLOC, in conjunction with interventional cardiologists, on the risk of radiation-induced cataracts among this category of practitioner. The analysis of the results obtained, compared to those from a control group of nonexposed workers and who are comparable in terms of both age and clinical characteristics, has demonstrated a risk of posterior subcapsular cataracts that is almost 4 times higher among interventional cardiologists.