编辑器:阅后深思熟虑和挑衅Schriger博士和他的同事们的研究,1我们不确定他们的研究结果的普遍性。作者仔细地表明,计算层析(CT)解释的准确性取决于扫描类型的困难。解释的平均正确的分数范围从98%“易出血”只有48%“急性梗死困难。”They also provided the frequency distribution of scan types shown to the physician readers. To evaluate the external validity of their results, however, we need to know the distribution of scan types for the general population of patients with acute stroke, not just the patients in their protocol library.