A) electroencephalography
B) electrocardiography
C) magneto encephalography
D) sonography
Correct Answer: D
Solution :
The crystal of lead zirconate titanate widely used in ultrasound imaging techniques (Sonography). In this medical technique these crystals are act as transducers (substances that have the property of being able to convert one form of energy into another). The ultra-sonic waves are produced from a transducer and travel through human tissues at a velocity of some 1500 metres per second. After reading to a object or surface now wave is reflected back. These echoes are received by the apparatus and changed into electric current and shown on a cathode ray tube.You need to login to perform this action.
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