BACKGROUND & AIMS:
:To assess the doses delivered to pediatric patients during computed tomography (CT) examinations of the brain, chest, high-resolution lung and abdomen, and to establish diagnostic reference levels (DRLs) for various age groups in Korea. Dose survey was done to the 19 hospitals performing CT on children, addressing the scan parameters, volume CT dose index (CTDIvol) and dose length product (DLP). Per five age group (0, 1, 2-5, 6-10, 11-17 y of age), the proposed DRLs for brain, chest, high-resolution lung and abdomen CT are, respectively, in terms of CTDIvol: 18, 23, 26, 31, 36 mGy; 2, 3, 4, 6, 8 mGy; 2, 3, 4, 5, 7 mGy; 3, 4, 5, 6, 9 mGy; and in terms of DLP: 260, 350, 420, 500, 620 mGy•cm; 50, 80, 100, 170, 340 mGy•cm; 30, 40, 60, 90, 280 mGy•cm; 70, 80, 200, 300, 500 mGy•cm. Compared with published DRLs our suggestion for pediatric CT dose is the lower end. However, an optimization process should be initiated to reduce the spread in patient dose among hospitals despite same CT protocols shown in the study. A major element of this process should be the establishment of institution performance standard and the use of built DRLs.
背景与目标:
:评估在韩国,各个年龄段的计算机X线断层扫描(CT)检查期间对儿科患者进行的脑,胸部,高分辨率肺和腹部剂量,并确定诊断参考水平(DRL)。对19所进行儿童CT扫描的医院进行了剂量调查,包括扫描参数,CT体积剂量指数(CTDIvol)和剂量长度乘积(DLP)。每5个年龄段(0、1、2-5、6-10、11-17岁),建议的脑,胸部,高分辨率肺和腹部CT的DRL用CTDIvol表示:18 ,23,26,31,36 mGy; 2,3,4,6,8 mGy; 2,3,4,5,7 mGy; 3、4、5、6、9 mGy; DLP:260、350、420、500、620 mGy•cm; 50、80、100、170、340 mGy•cm; 30、40、60、90、280 mGy•cm; 70、80、200、300、500 mGy•cm。与已公布的DRL相比,我们对儿科CT剂量的建议较低。然而,尽管研究中显示了相同的CT方案,但仍应启动优化过程以减少患者在医院之间的剂量分布。此过程的主要内容应该是建立机构绩效标准和使用内置的DRL。