Explain the difference in the technology behind several different diagnostic imaging procedures
What will be an ideal response?
1. Computed tomography scan
• Uses X-rays
• Produces cross-sectional view
• Takes multiple-angle views
2. Ultrasound
• Uses high-frequency sound waves
• Echoes off internal structures and computer uses to produce an image
3. Magnetic resonance imaging
• Uses electromagnetic energy
• Shows soft tissues
4. Nuclear medicine
• Uses radioactive substances
• Accumulates in certain body tissues
• Radioactivity emitted exposes an X-ray film to produce an image
5. Positron emission tomography
• Patient given injection of radioactive glucose
• Glucose accumulates in areas of high metabolic activity
• Radioactive glucose exposes a plate to produce an image
6. Contrast studies
• Radiopaque dye is injected or swallowed
• Body structures containing dye are outlined on X-ray
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