X-rays and ultrasound 0.0 / 5 ? PhysicsMedical PhysicsGCSEAQA Created by: chloefaunCreated on: 17-04-14 15:31 What are x-rays absorbed by? Denser materials- bones and metal 1 of 8 What does a CT scan do? It uses an x-ray tube and takes multiple images to create a 3D image 2 of 8 Name the precausions taken by radiographers Wearing lead aprons, stand behind a lead screen, badge with amount of radiation received 3 of 8 What is the range of human hearing? Between 20 and 20,000Hz 4 of 8 What is ultrasound? The frequency of sound above human hearing 5 of 8 Name two uses of ultrasound in industry Sonar on boats, finding weak points or cracks in metal 6 of 8 How does ultrasound work? A pulse of ultrasound is pointed at an object, where the boundaries are between the substances and the ultrasound reflects back 7 of 8 Name two uses of ultrasound in medicine Breaking down kidney stones,pre-natal fetes scanning 8 of 8
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