Department of Radiology and of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada.
J Evid Based Med. 2012 May;5(2):48-9. doi: 10.1111/j.1756-5391.2012.01174.x.
Accuracy is the primary evidence assessed when diagnostic imaging is evaluated in clinical practice guidelines. However, recommendations to not use diagnostic imaging are usually based not on its accuracy but on its lack of utility, that is its low Level 4 efficacy. If there is good clinical evidence that diagnostic imaging will not be useful in a clinical situation, the recommendation not to use it should be strong even if the evidence for its accuracy is of poor quality.
在临床实践指南中评估诊断影像学时，首要评估的是准确性。然而，不建议使用诊断影像学的建议通常不是基于其准确性，而是基于其缺乏实用性，即其低水平的四级疗效。如果有很好的临床证据表明在某种临床情况下诊断影像学将没有用处，那么即使其准确性的证据质量较差，不建议使用它的建议也应该是强烈的。
