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2.9 - Imaging of the Head

from Section 2 - Diagnosis, Assessment, Investigation, Monitoring and Data Interpretation

Published online by Cambridge University Press:  27 July 2023

By
Chun Wah So  and
Matthew Gale
Edited by
Ned Gilbert-Kawai ,
Debashish Dutta  and
Carl Waldmann
Ned Gilbert-Kawai
Affiliation:
The Royal Liverpool Hospital
Debashish Dutta
Affiliation:
Princess Alexandra Hospital NHS Trust, Harlow
Carl Waldmann
Affiliation:
Royal Berkshire Hospital, Reading
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Summary

Key Learning Points

  1. 1. Delineation of the lobes on CT is more difficult than on MRI, and instead they are often referred to as ‘regions’ on CT.

  2. 2. Appreciation of the cerebrospinal fluid (CSF) spaces is useful to assess brain volume, mass effect, hydrocephalus and haemorrhage.

  3. 3. Subarachnoid haemorrhage (SAH) is commonly seen as abnormal high attenuation within the cerebral sulci, ventricles and/or the basal cisterns.

  4. 4. Subdural haematomas (SDH) appear on CT as a concave extra-axial collection (outside the brain parenchyma).

  5. 5. Extradural haematomas (EDH) appear as a convex/lens shape and usually underlie a fracture. If the haematoma extends past a suture, it is not extradural.

Keywords

subarachnoid haemorrhagesubdural haematomaextradural haematomaischaemic stroke
Type
Chapter
Information
Intensive Care Medicine
The Essential Guide
 , pp. 61 - 67
Publisher: Cambridge University Press
Print publication year: 2021

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References

References and Further Reading

Holmes, E, Forrest-Hay, A, Misra, R. Interpretation of Emergency Head CT: A Practical Handbook. New York, NY: Cambridge University Press; 2008.CrossRefGoogle Scholar
Lewis, G, Patel, H, Modi, S, Hussain, S. On Call Radiology. Boca Raton, FL: CRC Press; 2016.Google Scholar
Radiology Masterclass. 2008. Acute CT brain. www.radiologymasterclass.co.uk/tutorials/ct/ct_acute_brain/ct_brain_startGoogle Scholar

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