Pediatric CT scan usage in Japan: results of a hospital survey
The aim of this study was to examine the usage parameters of diagnostic computed tomography (CT) in children because of concerns of possible overuse in Japanese hospitals, including the “technical” CT exposure settings and the “clinical” grounds for CT requests.
Materials and methods
We examined the methodology at the radiology department to reduce radiation exposure to children and performed a retrospective study on pediatric CT requests during a 1-year period at Nagasaki University Hospital. The parameters of diagnostic CT usage for minor head trauma and acute appendicitis were studied in detail.
CT radiation dose settings are adjusted for children based on guidelines issued by the Japan Radiological Society, with few limitations. CT requests were made for 62% of minor head trauma cases and 76% of cases clinically suspected to be acute appendicitis. These figures are considerably higher than those reported by studies in the United Kingdom, Canada, or the United States. No specific guidelines are advocated regarding CT usage for minor head trauma. The diagnosis of acute appendicitis in children is almost routinely referred for “confirmation” by CT.
CT radiation risks to children at Japanese hospitals need to be considered more seriously. Physicians should be encouraged to follow diagnostic algorithms that help avoid unnecessary CT usage in children.
Key wordsAcute appendicitis Computed tomography (CT) Diagnostic radiation dose Minor head trauma Pediatric radiology
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- 7.Online information available at the homepage of the Japan Radiological society (JRS) (http://www.radiology.or.jp/docs_htm/pediatricCT2005.pdf) and also other guidelines by the Japan Association of Radiological Technologists (JART) available at http://www.jart.jp/guideline/ (both in Japanese)Google Scholar
- 8.Takagi, H 2002X-ray exposure dose control for X-ray CT system (in Japanese)Jpn J Med Phys (Igaku Butsuri)22817Google Scholar
- 10.International Commission on Radiological Protection. Managing patient dose in computed tomography. ICRP Publication 87. Ann ICRP 2001;30(4)Google Scholar
- 33.Nishizawa, K, Matsumoto, M, Iwai, K, Tonari, A, Yoshida, T, Takayama, M 2002Dose evaluation and effective dose estimation from multi detector CT (in Japanese)Jpn J Med Phys (Igaku Butsuri)221528Google Scholar