Department of Surgery, Royal Glamorgan Hospital, Ynysmaerdy, Llantrisant, UK.
Clin Radiol. 2011 Aug;66(8):748-51. doi: 10.1016/j.crad.2011.03.009. Epub 2011 May 4.
To investigate knowledge of the use of ionizing radiation in 2010 and whether there has been any change in this knowledge since the study was first undertaken over 7 years ago.
In both studies a single chest x-ray was classed as one unit of radiation. Doctors from all grades were asked to evaluate the average radiation dose incurred with 13 commonly undertaken radiological procedures, including magnetic resonance imaging (MRI), computed tomography (CT), etc. Answers within 20% of the actual dose were marked as correct.
Two hundred and forty-two questionnaires were completed (130 in 2003; 112 in 2010). Equal numbers of juniors, middle grades, and consultants were questioned, and scores were comparable (23.3% in 2003; 29.4% in 2010). The majority of doctors (92% in 2003; 86% in 2010) correctly noted that ultrasound and MRI involve no radiation. Doctors underestimated the radiation doses of all investigations by a smaller margin in 2010 compared to 2003 (i.e., more accurately), with only one exception: CT of the abdomen.
Despite evidence of some improvement, doctors of all grades still have a very poor knowledge of radiation exposure even with the most common investigations. The worsening appreciation of the radiation involved in CT scanning is especially worrying considering its increasing use in practice today.
调查 2010 年医生对电离辐射使用的了解情况，以及自 7 年前首次开展此项研究以来，他们对这方面知识是否有所改变。
在两项研究中，单次胸部 X 光检查被归类为一个放射单位。研究询问了各个级别的医生，他们需评估 13 种常见影像学检查程序（包括磁共振成像（MRI）、计算机断层扫描（CT）等）所带来的平均放射剂量。答案与实际剂量的偏差在 20%以内的视为正确。
共完成了 242 份调查问卷（2003 年 130 份；2010 年 112 份）。初级医生、中级医生和顾问医生的人数相同，得分也相当（2003 年为 23.3%；2010 年为 29.4%）。大多数医生（2003 年为 92%；2010 年为 86%）正确指出超声和 MRI 不涉及辐射。与 2003 年相比，2010 年的医生对所有检查的放射剂量估计都缩小了较小的范围（即，更准确），仅有一个例外：腹部 CT。
尽管有一些改善的证据，但各个级别的医生对辐射暴露的了解仍然非常差，即使是最常见的检查也是如此。鉴于 CT 扫描在当今实践中的应用越来越广泛，对其涉及的辐射的认识不断恶化尤其令人担忧。
