https://www.youtube.com/live/pUtZam-oA1U?si=ofYHhRx9wHg0rqSc 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 Medullobla...