This document provides guidance on interpreting a basic computed tomography (CT) scan of the brain. It outlines a systematic approach by comparing left and right sides, looking for midline shifts, and reviewing cross-sectional anatomy at each slide. Key anatomical landmarks are identified, including gray matter, white matter, ventricles, cisterns, sulci and fissures. Specific pathologies like subdural hematomas and physiologic calcifications are also addressed.

1. Basic Reading Computed Tomography ( CT ) of Brain By…Ext. วรปรัชญ์ สามารถ

2. Systemic Approach to Head CT Interpretation Symmetry – Compare left and right side of the cranium Midline – Look for midline shift Cross-sectional anatomy – Review anatomical landmark for each slide Brain tissue : gray matter, white matter , intracerebral lesions CSF space : ventricle, basal cistern, cortical sulci, fissure Skull and soft tissue : scalp swelling, fractures, sinuses, orbit Subdural windows : Look for blood collection adjacent to the skull Bone windows : Skull, orbit and sinuses, intracranial air

3. Lateral View of Brain

4. Ventricular System

5. Cross-sectional Anatomy Grey/White interface, Subcortical white matter

6. Cross-sectional Anatomy Paired of crescent-shape = Twin bananas

7. Cross-sectional Anatomy

8. Basal ganglia

9. Cross-sectional Anatomy Third ventricle, Basal ganglia, Superior cerebellar cistern

10. Hydrocephalous

11. Physiologic Calcification

12. Brain Anatomy

13. Cross-sectional Anatomy Third ventricle, Smiley face

14. Cross-sectional Anatomy Midbrain, Interpeduncular cistern

15. Cross-sectional Anatomy Star shape ~ Circle of Willis, Fourth ventricle, Temporal horn ~ slit

16. Subarachnoid hemorrhage

17. Cross-sectional Anatomy Base of skull, Midline bony prominence, Prepontine cistern, Pretrous bone, Frontal sinus

18. Cross-sectional Anatomy Orbits , Ethmoid air cell

20. The End…