Transmitting Ultrasound Pulses

Ultrasound pulses are mechanical waves which can propagate in tissue. In order to create these pulses, ultrasound transducers are used. An ultrasound transducer can typically convert mechanical energy into electrical energy and vice versa.

To image tissue with ultrasound waves, two main types of ultrasound waves are used:
 * pulse waves
 * continuous waves

An ultrasound pulse wave is generated by a applying a short duration (a pulse) electrical signal to an ultrasound transducer. The pulse can be a a signal like this: $$u(t) = sin(2\pi\cdot 2MHz \cdot t) $$