基于医院放射科信息系统的儿童CT检查频度调查

目的 调查某综合医院儿童CT检查的频度分布情况。方法 利用放射科信息管理系统（RIS）搜集2012年1月1日至12月31日期间，儿童接受CT检查时患者就诊编码、性别、出生日期、受检时间、检查部位等相关信息，对儿童重复接受检查情况、患儿接受CT检查的原因和CT检查结果阳性率分布及其影响因素进行分析。结果 该医院2012年共有1 542名儿童进行CT检查1 670次，其中，男性占67%；头部CT的检查频度最高，占所有CT检查的71.9%，其次为腹部/骨盆；接受CT重复检查的儿童大约占6.4%；51.7%的CT检查原因是外伤。CT检查结果阳性率为51%，年龄与检查部位对CT阳性率有一定影响，其中年龄较小患者接受CT检查阳性率较低；头部CT阳性率低于其他部位。结论 儿童接受CT检查时应进行正当性判断，以尽可能降低CT检查可能诱发癌症的风险。

Investigation of CT scan frequency in children based on RIS in a hospital

Objective To ascertain the frequency distribution of CT examinations in children. Method A wide range of information was collected through the radiology information system (RIS), including ID, sex, birth date, examination time, the examined part of body and other relevant ones related to children who underwent CT examinations between Jan 1, 2012 and Dec 31, 2012. The SAS software was used for data processing and statistical analysis.Results A total of 1 542 children underwent 1 670 examinations, of which 67% were male. Head CT examination was the most frequent, accounting for 71.9% of all CT examinations, and followed by the abdomen/pelvis examinations. The number of examinations of children undergoing the repetitive examination accounted for 6.4%; 51.7% of the examinations was for trauma. The positive rate of CT examination was 51%, dependent upon the age and examined body parts to some extent. The younger patients had lower positive rate, and the positive rate of head CT examination was lower than those in other parts. Conclusions To reduce the possible cancer risk to be induced by the ionizing radiation from CT, justification of CT examination should be considered for children.