Héliou Régis, Normandeau Lysanne, Beaudoin Gilles
Centre Hospitalier de l'Université de Montréal, Hôpital Notre-Dame, Montréal, Québec, Canada.
Radiat Prot Dosimetry. 2012 Jan;148(2):202-10. doi: 10.1093/rpd/ncr024. Epub 2011 Mar 15.
Dose indicators such as the computed tomography dose index (CTDI) and dose-length product (DLP) were gathered for all routine abdomen-pelvis, chest and head examinations performed on all computed tomography (CT) scanners at a University Health Center (UHC) in Canada. These indicators were analysed and compared with the range of diagnostic reference levels (DRLs) suggested by Health Canada and with DRLs in other countries. Mean DLP values varied from one scanner to another, but mean values at the UHC (750 mGy cm(-1) for abdomen-pelvis CT, 349 mGy cm(-1) for chest CT and 1181 mGy cm(-1) for head CT) were all below the upper limit of the range of DRLs suggested by Health Canada. Local DRLs at the UHC were set to 810 mGy cm(-1) for abdomen-pelvis CT, 345 mGy cm(-1) for chest CT and 1205 mGy cm(-1) for head CT. Results, however, show the need for protocols revisions, since some scanners exhibit mean DLP values slightly below or above the upper limit of the range of DRLs suggested by Health Canada.
加拿大一所大学健康中心（UHC）的所有计算机断层扫描（CT）扫描仪对所有常规腹部-盆腔、胸部和头部检查收集了剂量指标，如计算机断层扫描剂量指数（CTDI）和剂量长度乘积（DLP）。对这些指标进行了分析，并与加拿大卫生部建议的诊断参考水平（DRL）范围以及其他国家的DRL进行了比较。平均DLP值因扫描仪而异，但UHC的平均值（腹部-盆腔CT为750 mGy cm⁻¹，胸部CT为349 mGy cm⁻¹，头部CT为1181 mGy cm⁻¹）均低于加拿大卫生部建议的DRL范围上限。UHC的局部DRL设定为腹部-盆腔CT为810 mGy cm⁻¹，胸部CT为345 mGy cm⁻¹，头部CT为1205 mGy cm⁻¹。然而，结果表明需要修订方案，因为一些扫描仪的平均DLP值略低于或高于加拿大卫生部建议的DRL范围上限。
