An estimation of the genetically significant dose from diagnostic radiology for the South African population, 1990-1991.
The genetically significant dose was initially defined by UNSCEAR in 1958. The National Radiological Protection Board (NRPB) derived a formula from this definition as shown in the NRPB Report, NRPB-R106. It combines the frequency of radiological examinations obtained during the country-wide survey and estimates of gonadal doses for different examination types, together with population and child expectancy data. The task was set to find a model in order to draw the best representative sample of the population, and it was determined in a unique way, namely the so-called Dollar Unit Sampling method. A sample of 27 institutions out of a possible 292 (9%) was drawn. The GSD for the total South African population was calculated, using the above-mentioned formula, as 95 microGy. The breakdown of the genetically significant dose for the various South African race groups was Asian--229 microGy; black--67 microGy; people of color (mixed race)--112 microGy; and white--463 microGy.
Hering
E R
ER
Department of Medical Physics, Groote Schuur Hospital, Cape Town, South Africa.
Kotze
T J
TJ
Maree
G J
GJ
D000367:Age Factors; D003625:Data Collection; D004307:Dose-Response Relationship, Radiation; D005260:Female; D005835:Genitalia / Q000528:radiation effects*; D006801:Humans; D008297:Male; D044469:Racial Groups; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000453:epidemiology*; D011859:Radiography / Q000706:statistics & numerical data*; D012737:Sex Factors; D013019:South Africa