• Stralingsbescherming van de patient bij diagnostiek met ioniserende straling: een probleemanalyse ten behoeve van beleidsondersteuning

      Shapiro B; Pruppers MJM; Leenhouts HP; LSO (Rijksinstituut voor Volksgezondheid en Milieu RIVM940630, 1994-06-30)
      Members of the population are exposed to both natural and artificial sources of ionizing radiation. The contribution of artificial sources to the collective radiation dose of the population in the Netherlands amounts to approximately 20 %, 95 % of which is caused by medical applications. For determining the policy of the Ministry of Welfare, Public Health and Cultural Affairs the main question, considering the risks of exposure to radiation, is whether medical applications of ionizing radiation are used responsibly. The aim of the analysis described in this report is to produce a clear overview of highly aggregated information on medical applications, as far as this information is related to policy support, policy evaluation and research priorities. Firstly, the factors which influence the medical radiation dose are outlined, followed by a discussion on necessary and available information. In describing the radiation dose of the patient three quantities are distinguished, i.e. the individual and collective dose and the dose distributions. At the moment the available information is concluded to give only limited insight into the level of the medical radiation dose. An important question is which part of the dose is unnecessary and thus possibly avoidable. However, data on the dose distribution per medical procedure and, more important, on the factors which determine this distribution are far from sufficient. Only a few data are available on the difference in dose resulting from identical medical procedures in different hospitals. Collecting current data on the number of medical applications and on the individual dose per medical procedure is recommended to characterize the present situation in the Netherlands and to visualize trends in time. To answer the question on which part of the medical radiation dose is unnecessary and thus possibly avoidable it is recommended to study the dose distributions for different medical procedures and especially to focus on the causes of the observed distributions.<br>