Here's a table highlighting the key differences between CT (Computed Tomography) and MRI (Magnetic Resonance Imaging) scans:-
CT scan | MRI scan | |
Bone cortex | White | Black |
Technology | Uses X-rays to create cross-sectional images | Uses strong magnetic fields and radio waves |
Best for | Imaging bones, detecting fractures, and acute bleeding | Soft tissue evaluation (brain, muscles, heart, cancers) |
Radiation Exposure | Yes, involves ionizing radiation (X-rays) | No, uses non-ionizing radiation |
Image Detail | Better for bone details and dense tissues | Superior for soft tissues, ligaments, and organs |
Scan Time | Typically faster (a few minutes) | Longer (30-60 minutes or more) |
Cost | Generally less expensive | Generally more expensive |
Contrast Agents | Uses iodine-based contrast agents (risk of allergy) | Uses gadolinium-based agents (less allergic reactions) |
Artifacts | More susceptible to artifacts from metal objects | Less affected by metal, but can cause heating |
Use in Pregnancy | Generally avoided due to radiation risk | Considered safer but used with caution |
Movement Sensitivity | Less sensitive to patient movement | Very sensitive to movement; requires patient stillness |
Availability | Widely available in many medical facilities | May be less available due to higher cost and complexity |