An effect exhibited by certain quartz crystals (such as lead zirconate titanates) known as ‘piezoelectric crystals’ The piezoelectric crystal will change shape when an electrical potential is applied across it: Dimensions change slightly depending upon the...
Ultrasound waves are produced by an ultrasound probe: An electric current is passed through a piezoelectric crystal: Act as transducers converting electrical energy into mechanical vibrations at high frequencies Generates ultrasound waves at the frequency of the...
The transducer alternates through phases of generating and receiving ultrasound waves The ‘Transmission Phase’ is the period of wave generation: Usually very brief (0.5–3 μs) Followed by a ‘Receiver Phase’ for wave detection: Much longer (up to...
High-frequency sound waves greater than 20 kHz Medical ultrasound uses waves of very high frequency, in the range of 2-20 MHz The human audible range is 20-20 000...
