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A brain CT scan identifies tumors by detecting abnormal tissue density (attenuation), mass effect (displacement of normal structures), or surrounding swelling (oedema) Bleeding,
Key Imaging Labels and Features
Attenuation Levels:
Hypodense (Darker): Often indicates a low-grade tumor or associated oedema (swelling).
low-density (hypodense) lesions. They usually grow slowly, often display poorly defined margins, and rarely show contrast enhancement or surrounding severe swelling. CT has lower soft-tissue contrast compared to MRI, making smaller or deeper low-grade tumors difficult to see.
.
Brain and Nervous System tumor
Example
Schwannoma
Meningioma
Pilocytic Astrocytoma
Oligodendroglioma
• Diffuse Astrocytoma
Hyperdense (Brighter): Can suggest a highly cellular tumor, calcification, or recent haemorrhage within the mass.
Meningioma
Lymphoma
Medulloblastoma
Full session in YouTube
Germinoma
An isodense brain tumor appears the same shade of gray as normal, healthy brain
tissue on a non-contrast CT scan.
Gliomas
Metastatic Brain Tumors
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