Question

The principle that is used to generate ultrasounds in ultrasonography is
A. Nuclear magnetic resonance
B. Used short half life radioisotopes
C. Piezoelectric effect
D. Doppler effect

Answer 1

Hint: A procedure that uses high-energy sound waves to look at tissues and organs inside the body. The sound waves make echoes that form pictures of the tissues and organs on a computer screen called ultrasonography.

Complete answer: Ultrasound uses ultrasonic sound waves (above the range of human hearing) that are produced and detected within an ultrasound transducer.
Ultrasound waves (ultrasonic sound waves )are produced by a transducer, which can both emit ultrasound waves, as well as detect the ultrasound echoes reflected back.
In most cases, the active elements in ultrasound transducers are made of special ceramic crystal materials called piezoelectric materials.
Piezoelectric material generates ultrasound in ultrasonography and this effect is known as Piezoelectric effect.
Ultrasound (ultrasonic sound waves) is a useful way of examining many of the body's internal organs, including but not limited to the:
Heart and blood vessels, including the abdominal aorta and its major (all) branches,
Liver, gallbladder, spleen, pancreas, kidneys, bladder, uterus, ovaries, and unborn fetus (child) in pregnant patients.

So the correct answer is (C) ‘Piezoelectric effect’

Note: An ultrasound is a tool used to take a picture of a body organ or internal organs.
 A sonogram (sonography) is the picture that the ultrasound generates. Sonography is the use of an ultrasound tool for diagnostic purposes (stomach related problem).