This work is part of general program of the diagnostic radiation dosage monitoring in the C.H.U. of Brest. The aim of these measurements is to precise the doses delivered to the sensitive organs in infants from one to thirty days of age in the intensive care pediatric Department. We present in this paper the technology used and the results of these controls. We complete this experimental work with a statistical study of the number of radiographies made in the intensive care pediatric Department on 623 children. We insist on the use of leaded protection in the radiodiagnostic practice, as often as it is possible.