Radiology, Vol 150, 79-85, Copyright © 1984 by Radiological Society of North America
Chronic subdural hematoma: demonstration by magnetic resonance
JT Sipponen, RE Sepponen and A Sivula
The ability of magnetic resonance (MR) to identify intracranial hematomas
was tested in five patients with clinical and computed tomographic signs of
chronic subdural hematoma. The extracerebral collections were displayed as
a zone of bright intensity using the T1- weighted inversion recovery (IR
1,500/400) sequence, reflecting the lesions' short T1 relaxation times. The
collections also showed high intensity using the spin echo (SE) sequence,
with a longer delay of 100 ms and 160 ms, reflecting the long T2 relaxation
time. The spin echo sequence with a repetition time of 500 ms and an echo
delay of 160 ms (SE 500/160) almost effaced other structures in the image,
thus increasing the specificity of this pulse scheme for detection of
chronic blood collections. Although in two of the five patients the
subdural hematomas were in the isodense CT phase, all were easily
visualized with MR.
