Abstract
Dose-area products (DAP) in paediatric fluoroscopic examinations were measured at paediatric clinics in three university hospitals. The purpose was to provide supplementary data for development of reference doses, and for determination of relations between patient size and dose, in examinations involving both radiography and fluoroscopy for paediatric patients of various ages. The number of paediatric patients was 217. The most common fluoroscopic examinations were: micturating cystourethrography (MCU), 103 patients; barium enema (anography), 39 patients; barium meal and follow, 20 patients; and oesophagus, nine patients. Data on the patients and examination techniques, and the dose-area products are reported for various examinations and age groups. In the MCU examinations, the mean DAP values were 560 mGy.cm 2 for the age group of 0 years; 910 mGy.cm 2 for the age group of 1-4 years; 880 mGy.cm 2 for the age group of 5-9 years; and 4600 mGy.cm 2 for the age group of 10-15 years. The radiation doses to which paediatric patients are exposed in fluoroscopic examinations vary over a large scale, even within narrow age bands, and comparisons between the doses are difficult because of wide ranges in patient size. This indicates the need for developing a method for taking account of the effects of patient size before deriving reference doses.
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