Tynan Jennifer R, Duncan Meghan D, Burbridge Brent E
Department of Medical Imaging, University of Saskatchewan, Royal University Hospital, Saskatoon, Saskatchewan, Canada.
Can Assoc Radiol J. 2009 Oct;60(4):182-4. doi: 10.1016/j.carj.2009.06.006. Epub 2009 Jul 23.
A recent publication from our centre revealed a disturbing finding of a significant incidence of adult fingers seen on the pediatric intensive care unit (PICU) chest radiographs. This is inappropriate occupational exposure to diagnostic radiation. We hypothesized that the incidence of adult fingers on PICU chest radiographs would decline after radiation safety educational seminars were given to the medical radiation technologists and PICU staff.
The present study's objectives were addressed by using a pretest-posttest design. Two cross-sectional PICU chest radiograph samples, taken before and after the administration of radiation safety education for our medical radiation technologists and PICU staff, were compared by using a chi2 test.
There was a 61.2% and 76.9% reduction in extraneous adult fingers, directly exposed to the x-ray beam and those seen in the coned regions of the film, respectively, on PICU chest radiographs (66.7% reduction overall). This reduction was statistically significant (chi2 = 20.613, P < .001).
Limiting unnecessary occupational radiation exposure is a critical issue in radiology. There was a statistically and clinically significant association between radiation safety education and the decreased number of adult fingers seen on PICU chest radiographs. This study provides preliminary evidence in favour of the benefit of radiation safety seminars.
我们中心最近发表的一项研究揭示了一个令人不安的发现,即在儿科重症监护病房(PICU)的胸部X光片中出现成人手指的情况发生率颇高。这属于不适当的职业性诊断辐射暴露。我们推测,在对医学放射技师和PICU工作人员进行辐射安全教育研讨会后,PICU胸部X光片中成人手指出现的发生率将会下降。
本研究采用前后测设计来达成目标。通过卡方检验比较了两组PICU胸部X光片样本,一组是在对医学放射技师和PICU工作人员进行辐射安全教育之前拍摄的,另一组是之后拍摄的。
PICU胸部X光片中,直接暴露于X射线束的无关成人手指减少了61.2%,胶片锥形区域中出现的成人手指减少了76.9%(总体减少66.7%)。这种减少具有统计学意义(卡方 = 20.613,P < .001)。
限制不必要的职业辐射暴露是放射学中的一个关键问题。辐射安全教育与PICU胸部X光片中成人手指数量减少之间存在统计学和临床意义上的显著关联。本研究提供了初步证据,支持辐射安全研讨会的益处。