Which device uses ultrasonic waves for getting images of internal organs of human body?
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A.
X-ray machine
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B.
CT scanner
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C.
MRI scanner
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D.
Ultrasound scanner
Correct Answer:
@.
Explanation:
Ultrasound scanners use high-frequency sound waves, known as ultrasonic waves, to create images of the body's internal structures. These sound waves travel through the skin and bounce off internal organs and tissues, creating echoes that the scanner records and converts into visual images. Unlike X-rays or CT scans, this technology does not use ionizing radiation, making it a safe method for monitoring fetal development during pregnancy and examining various soft tissues or organs. Other imaging techniques like MRI use magnetic fields and radio waves, while CT scans and X-rays rely on electromagnetic radiation.
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