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MN1-5531 Rev. 10
2. Specifications and Parts name
2-1. Principles of operation
This probe and the ultrasound diagnostic instrument enable image diagnosis using ultrasonic waves. These
instruments operate under the principles described below.
(1) When an electric pulse signal is applied from the transmitter to the transducer of the probe, the transducer
operates by converting electrical vibrations to mechanical vibration energy for emitting pulse-shaped
ultrasonic waves into the body part contacting the transducer or into liquid or other medium.
(2) The emitted ultrasonic waves are reflected by boundaries with different acoustic characteristics (acoustic
impedance) within the body.
(3) The transducer is also used to receive reflected ultrasonic waves. The transducer vibrates mechanically due
to the received ultrasonic vibrations and uses an electro-mechanical conversion operation to convert the
received mechanical vibrations to electric energy. The received echo is also converted to electric signals
and a brightness modulation operation is used to convert the electric pulses to shades of brightness for
forming an image.
Summary of Contents for UST-9120
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