Computed tomography of cranial subdural and epidural hematomas: variation of attenuation related to time and clinical events such as rebleeding.
Forty-one cases of subdural and nine of epidural hematomas were studied with regard to attenuation and the time between trauma and computed tomography scanning. The attenuation of the hematomas showed a consistent decrease with time during the first 4 weeks. High attenuation of chronic subdural hematomas is explained by a sudden or continuous rebleeding. No correlation was found between the attenuation of the hematoma and the attenuation of venous blood from the same patient.
D001921:Brain / Q000000981:diagnostic imaging*; D002908:Chronic Disease; D006407:Hematoma, Epidural, Cranial / Q000000981:diagnostic imaging*; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging*; D006801:Humans; D012008:Recurrence; D013997:Time Factors; D014057:Tomography, X-Ray Computed