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...
Understanding CECT Abdomen: The Preparation Behind a Successful CT Scan In the busy environment of a radiology department, every CT scan tells a story. Among the most important scans performed daily is the CECT Abdomen — also known as Contrast Enhanced Computed Tomography of the Abdomen. While patients often see only the machine and the scanning process, there is actually a detailed preparation happening behind the scenes to ensure the images are clear, accurate, and safe. Why Fasting Is Important Before a CECT Abdomen When a patient arrives for a CECT abdomen scan, the first thing we usually ask is: “Have you eaten anything in the last 4 to 5 hours?” For most abdominal contrast CT scans, the patient must remain NPO (Nil Per Oral) for around 4–5 hours. Drinking plain water is usually allowed, but eating food is avoided. This preparation is important because contrast injection can sometimes create a feeling of nausea or vomiting. If the stomach is full, the patient may vomit during the ...