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Sound Waves of Health: The Power of Ultrasound
Explore the fascinating world of ultrasound technology! Learn about its safe use of sound waves, the role of frequencies in imaging, and how the Doppler effect helps diagnose conditions by analyzing blood flow.
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Prompt
1. What frequencies are used in ultrasound? Why do they use these frequencies? 2. How is is safer? What makes radiation dangerous? 3. What is the Doppler effect (sound)? How does this effect identify conditions? 1. • Ultrasound uses 2–18 MHz sound waves because: • Lower frequencies (like 2–5 MHz) can travel deeper into the body, which is useful for seeing organs like the heart or liver. • Higher frequencies (like 10–18 MHz) give clearer images, but they don’t go as deep, so they’re used for things close to the skin, like muscles or blood vessels. 2. How is ultrasound safer? Ultrasound is safer because it uses sound waves, not radiation. Sound waves don’t harm the body, so it’s safe to use, even during pregnancy. What makes radiation dangerous? Radiation, like in X-rays, can be dangerous because it has enough energy to damage cells and DNA. This can increase the chance of cancer if you’re exposed too much. 3. What is the Doppler Effect (sound)? The Doppler Effect is when the pitch of a sound changes if the object making the sound is moving. For example, when an ambulance passes by, the siren sounds higher as it comes closer and lower as it moves away. How does this help in ultrasound? In medicine, the Doppler Effect is used in Doppler ultrasound to check blood flow. It helps doctors see: • If blood is flowing normally • If there are blockages or clots • If blood is moving too fast or too slow This helps find problems with the heart, arteries, and veins.
