subarachnoid hemorrhage

• sensitivity of head CT for subarachnoid hemorrhage varies with time course:

           acutely             95-100%
           after 5 days          85%
           after 7 days          50%
  

• for chronic subdural hematoma: 97% sensitivity.

REF: MacNeil BJ, Abrams HL. Brigham and Women's Hospital Handbook of Diagnostic Imaging. Chapter 30.

© 2002, C.E. Kahn, Jr.
2002-04-18