Increased density of tentorium and falx: a false positive CT sign of subarachnoid hemorrhage.
Increased density of tentorium and falx: a false positive CT sign of subarachnoid hemorrhage.
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小脑幕和大脑镰密度增加：蛛网膜下腔出血的假阳性 CT 征象。
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
D. Pelz
中科院分区：
文献类型：
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作者：
S. Spiegel;A. Fox;F. Viñuela;D. Pelz
10例有严重脑肿胀或占位效应的患者的非增强计算机断层扫描（CT）结果显示大脑镰和小脑幕高密度，因此提示蛛网膜下腔出血。CT扫描后不久进行的尸检显示没有蛛网膜下腔血液。对随机抽取的100例CT扫描进行了回顾，以评估同一人群中高密度、非钙化大脑镰的频率，但未能证实这一发现。因此，在存在深度脑肿胀或占位效应的情况下，蛛网膜下腔出血以外的因素可能是导致头颅CT扫描中大脑镰和小脑幕密度增加的原因。
Noncontrast computed tomographic (CT) findings in 10 patients with profound brain swelling or a mass effect revealed a high density of the falx and tentorium and thus suggested subarachnoid hemorrhage. Postmortem examinations performed shortly after the CT scans demonstrated no subarachnoid blood. A review of 100 CT scans drawn at random was carried out to assess the frequency of a hyperdense, noncalcified falx in the same population and failed to demonstrate this finding. Therefore, in the presence of profound brain swelling or a mass effect, factors other than subarachnoid hemorrhage may be responsible for increased density of the falx and tentorium on cranial CT head scans.