Overview of Five major techniques used in brain imaging, each with its unique purpose, strengths, and limitations: 1. X-Ray Use: Primarily for imaging bones; not ideal for soft tissue like the brain. Fact: X-rays pass through soft tissue but are absorbed by denser structures like bone, making them suitable for detecting skull fractures. Limitation: Cannot show brain structures or abnormalities in detail. --- 2. CT (Computed Tomography) Scan Use: Cross-sectional images of the brain using X-ray technology. Fact: Good for detecting bleeding, tumors, and skull fractures. Limitation: Less detail on soft tissues compared to MRI. --- 3. MRI (Magnetic Resonance Imaging) Use: Provides detailed images of brain soft tissues using magnetic fields and radio waves. Fact: Excellent for detecting tumors, brain injuries, developmental anomalies, and multiple sclerosis. Limitation: More expensive and time-consuming than CT. --- 4. MRA (Magnetic Resonance Angiography) Use: Visualizes blood vessels in the brain. Fact: Often used to detect aneurysms, blockages, or vascular malformations. Limitation: Requires specialized equipment and often a contrast agent. --- 5. PET Scan (Positron Emission Tomography) Use: Assesses brain metabolism and activity. Fact: Commonly used in Alzheimer's research, cancer detection, and epilepsy diagnosis. Limitation: Involves radioactive tracers and is less spatially detailed than MRI.