Oita Prefectural Mie Hospital, 3964-1 Miyano, Mie Town, Bungo, Ohno-City 879-7101, Japan.
Health Phys. 2011 May;100(5):491-6. doi: 10.1097/HP.0b013e3181f497ef.
In 2007, a nationwide survey was conducted to determine the frequency of CT procedures in Japan in order to compare the current use of CT among developed countries. The frequency of adult and pediatric CT scans was estimated using a model based on the results of the survey. Survey questionnaires were sent to 2,266 CT facilities: 1,068 government hospitals and 1,198 other hospitals and non-hospital medical centers. The questionnaire requested information including the number of beds, outpatients per day, type of CT scanner, various body regions scanned, and the number of scans performed. The results of the study indicate that the number of CT procedures was closely correlated with the number of hospital beds. The authors estimate that approximately 20.5 million procedures were performed in 2005 and 21.2 million in 2006. The number of pediatric CT procedures was calculated by multiplying the total number of CT procedures by the estimated fraction of pediatric (0-15 y) CT procedures. Annual pediatric CT procedures were estimated to have been approximately 580,000 in 2005 and 600,000 in 2006. The present study indicates that the number of procedures per thousand of population, 166 for total CT and 32-34 for pediatric CT, is lower in Japan than in the U.S.
2007 年，在日本进行了一项全国性调查，以确定 CT 检查的频率，以便比较发达国家目前 CT 的使用情况。利用调查结果建立的模型来估计成人和儿科 CT 扫描的频率。向 2266 个 CT 设施发送了调查问卷：1068 家政府医院和 1198 家其他医院和非医院医疗中心。问卷要求提供有关信息，包括病床数、每天的门诊病人数、CT 扫描仪的类型、扫描的各种身体部位以及进行的扫描次数。研究结果表明，CT 检查的次数与医院病床数密切相关。作者估计，2005 年进行了约 2050 万次检查，2006 年进行了约 2120 万次检查。儿科 CT 检查的次数是通过将总 CT 检查次数乘以儿科（0-15 岁）CT 检查的估计比例计算得出的。2005 年和 2006 年，每年儿科 CT 检查的估计次数约为 58 万次。本研究表明，日本每千人的检查次数为 166 次，其中包括总 CT 检查和 32-34 次儿科 CT 检查，低于美国。
