Hello friends. I am pleased to write about a topic that has much to do with my profession and my field of work. One of the equipment to which I perform technical service is the ultrasound equipment or commonly known as : Have you ever seen how they perform an ultrasound study to pregnant women? Well, the ultrasound machine is the equipment used to perform this clinical study.

The first thing to know is that sound is composed of mechanical waves. These mechanical waves move at a certain frequency. The human ear can pick up a sound frequency from 20Hz to 20Khz. So ultrasound are mechanical waves that exceed the limit audible to a person, more than 20khz.

A well-known example is the microphone. When someone sings with a microphone the sound waves collide and generate an electrical potential that can then be amplified and heard in a bugle. The piezoelectric effect is the ability of some materials to alter their shape when an electric current is applied to them, of course, there must be some limits so that the piezoelectric crystal is not damaged.

Then, through the principle of piezoelectricity we can understand how ultrasound image acquisition occurs. As we can see in the image above, we have an ultrasound TRANSDUCER to which an electrical signal is applied and this emits a mechanical wave at a certain frequency, these waves collide against the different tissues of the patient and in turn, the patient's tissues generate mechanical waves that go to the ultrasound transducer and this information is then processed inside the equipment to generate the image. Of course, this is a very superficial explanation to illustrate how ultrasound images are obtained.