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CT Head
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CT Head
, Head CAT Scan, Head CT, CT Brain
See Also
Head Injury CT Indications in Adults
Head Injury CT Indications in Children
Head Injury CT Indications in Concussion
Indications
Cerebrovascular Accident
Differentiate
Hemorrhagic CVA
from
Ischemic CVA
More sensitive than LP for
Intracranial Hemorrhage
Test Sensitivity
diminishes from time of
Hemorrhagic CVA
Test Sensitivity
95-100% at 12 hours from onset
Test Sensitivity
50% at 7 days from onset
Hemorrhagic CVA
is not detectable on CT Head at 2-3 weeks from onset
Suarez (2006) N Engl J Med 354(4): 387-96 [PubMed]
Brain Tumor
s (larger than 2-4 mm)
Enhanced with iodinated
Contrast Material
Hydrocephalus
Subdural Hematoma
Evaluation of
Trauma
tic
Head Injury
CT Head in every
Severe Head Injury
CT Head in every
Moderate Head Injury
See
Head Injury CT Indications
See
Head Injury CT Indications in Children
Interpretation
See
CT Scan Window Width
Describes CT Windows for Brain Window or Subdural Window
Hemorrhage
appearance on CT changes with time
Acute
Hemorrhage
: Hyperdense (light, white)
Whiter than brain matter
Subacute
Hemorrhage
: Isodense
Similar density to brain matter and may be missed
Chronic
Hemorrhage
: Hypodense (dark)
Darker than brain matter
Old
Subdural Hematoma
may appear as a hygroma
References
Broder (2021) Crit Dec Emerg Med 35(5): 10-1
Haydel (2000) N Engl J Med 343:100-5 [PubMed]
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