在急诊室医生通常选择头颅CT扫描对可疑脑卒中患者进行初查,以明确排除脑出血。CT扫描对大多数脑出血患者有很高的敏感性,具有快速准确的优点,但对颅内微出血及部分蛛网膜下腔出血(SAH)不够敏感。据报道SAH发病后第1d的CT检出率为90%,3d后迅速降至50%,是临床诊治的潜在隐患。本 Doctors in the emergency room usually select the head CT scan for suspicious stroke patients to conduct a preliminary examination to specifically rule out cerebral hemorrhage. CT scan for most patients with cerebral hemorrhage is highly sensitive, with fast and accurate advantages, but not for intracranial hemorrhage and partial subarachnoid hemorrhage (SAH) is not sensitive. It has been reported that the detection rate of CT on the first day after SAH is 90% and rapidly dropped to 50% after 3d, which is a potential hidden danger in clinical diagnosis and treatment. this