Computer assisted tomography of unoperated subdural hematoma: short- and long-term follow-up.

Six recent and six long-term follow-up patients with subdural hematoma studied by computer assisted tomography are reported. This method was used to demonstrate progressive resolution of the hematoma in five of the recent patients as well as enlargement of the hematoma in one of the patients who subsequently was sent to surgery. Computer assisted tomography was also used to demonstrate absence of subdural hematoma in long-term follow-up of unoperated patients. The possible difficulty in visualizing an isodense subdural hematoma is discussed, as is the use of additional coronal views to improve subdural detection.