Lesson.10: Ultrasound scans and Treatment Objectives Describe the features of longitudinal waves. Recall and describe the main medical uses of ultrasound.

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Presentation transcript:

Lesson.10: Ultrasound scans and Treatment Objectives Describe the features of longitudinal waves. Recall and describe the main medical uses of ultrasound. Recall and describe the main medical uses of ultrasound. Explain why ultrasound is sometimes used instead of x-rays. Explain why ultrasound is sometimes used instead of x-rays.

Sound waves are longitudinal waves.

Complete ‘Ultrasound Scans and Treatment’ page 81 and 82.

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Learning Objectives State and recognise that the frequency of ultrasound is higher than the upper threshold of human hearing. State and recognise that ultrasound is a longitudinal wave. Recognise features of a longitudinal wave: amplitude; wavelength; frequency; compression; rarefaction. Describe features of longitudinal waves: amplitude; wavelength; frequency; compression; rarefaction. Describe the motion of particles in longitudinal and transverse waves.

Describe and recognise that ultrasound can be used in medicine: to look inside people by scanning the body; to break down kidney and other stones; to measure the speed of blood flow in the body. Describe applications of ultrasound: body scans; breaking down kidney and other stones. Explain how ultrasound is used in: body scans (reflections from different layers); breaking down accumulations in the body such as kidney stones. Explain the reasons for using ultrasound rather than X-rays: able to produce images of soft tissue; does not damage living cells.