For ultrasound, the frequencies of the sound waves are between which two ranges?

Study for the Image Modalities Test. Learn with flashcards and multiple choice questions, each comes with hints and explanations. Get ready for your credentialing exam in the field of medical imaging!

Multiple Choice

For ultrasound, the frequencies of the sound waves are between which two ranges?

Explanation:
Ultrasound uses high-frequency sound waves, well above what humans can hear. In medical imaging, frequencies are chosen in the megahertz range because that provides a good balance between image resolution and how deeply the sound penetrates tissue. The range 2 to 15 MHz is a common, practical window for many clinical applications, offering good resolution while still penetrating adequately into the body. The other options fall outside the ultrasound domain: 15 to 30 Hz is far below audible sound, 1 to 5 GHz is microwave electromagnetic radiation rather than sound waves, and 20 Hz to 20 kHz is the audible range, not ultrasound.

Ultrasound uses high-frequency sound waves, well above what humans can hear. In medical imaging, frequencies are chosen in the megahertz range because that provides a good balance between image resolution and how deeply the sound penetrates tissue. The range 2 to 15 MHz is a common, practical window for many clinical applications, offering good resolution while still penetrating adequately into the body.

The other options fall outside the ultrasound domain: 15 to 30 Hz is far below audible sound, 1 to 5 GHz is microwave electromagnetic radiation rather than sound waves, and 20 Hz to 20 kHz is the audible range, not ultrasound.

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