CT Brain Anatomy (NEET PG Focus)
Key CT Density Landmarks
| Structure | Density Appearance |
|---|---|
| Bone (Skull) | Hyperdense (White) |
| Acute Blood | Hyperdense (White) |
| Gray Matter | Isodense (Lighter Gray) |
| White Matter | Hypodense (Darker Gray) |
| CSF (Ventricles) | Hypodense (Black) |
NEET PG “Must-Know” Clinical Pearls
- Basal Ganglia Anatomy: In a standard axial slice, the lentiform nucleus (putamen + globus pallidus) is located lateral to the internal capsule and medial to the insular cortex.
- Intracranial Hemorrhage Signs:
- Epidural Hematoma: Biconvex (lens-shaped), does not cross suture lines.
- Subdural Hematoma: Crescent-shaped, crosses suture lines.
- Midbrain Landmarks: The quadrigeminal cistern and superior colliculi are key landmarks at the midbrain level.
- Mass Effect: Look for midline shift and effacement of the basal cisterns, which indicate increased intracranial pressure.
For additional high-yield questions and medical resources, you may visit mymedschool.org.