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Questions and Answers
What is the typical frequency range of ultrasound used in physical therapy?
What natural phenomenon is the production of ultrasound based on?
What happens when certain mineral crystals like quartz are compressed or deformed by mechanical means?
How is ultrasonic energy produced in physical therapy?
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What distinguishes ultrasound from sound waves?
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What is the frequency range of ultrasound typically used in physical therapy?
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What mineral crystals exhibit piezoelectricity, a phenomenon used in the production of ultrasound?
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How is ultrasonic energy produced in physical therapy?
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What distinguishes ultrasound from audible sound waves?
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What is the upper limit of the audible range of sound waves?
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Study Notes
Ultrasound in Physical Therapy
- The typical frequency range of ultrasound used in physical therapy is 0.8-3.0 MHz.
- The production of ultrasound is based on the natural phenomenon of piezoelectricity.
- When certain mineral crystals like quartz are compressed or deformed by mechanical means, they produce an electric charge.
- In physical therapy, ultrasonic energy is produced by applying an alternating current to a piezoelectric crystal, causing it to vibrate at high frequency.
- Ultrasound is distinguished from sound waves by its frequency range, which is above the audible range of human hearing.
- Quartz is a mineral crystal that exhibits piezoelectricity, a phenomenon used in the production of ultrasound.
- The upper limit of the audible range of sound waves is 20,000 Hz.
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Description
Test your knowledge of therapeutic ultrasound with this quiz covering the production, physical phenomena, physiological effects, therapeutic effects, indications, and contraindications of ultrasound.
