Ultrasonic waves are a form of energy from mechanical waves whose frequency is higher than human hearing. The human ear can hear waves between 20 Hz and 20000 Hz
Any wave (auditory or ultrasound) is a mechanical disturbance in a gas, liquid or solid medium that moves out of the sound source or at a uniform and specific speed. In the movement or damping of a mechanical wave, matter is not transferred if the vibration of the particles be in the direction perpendicular to the propagation of sound
Ultrasound is one of the most common and useful diagnostic methods for examining diseases. Although almost all people know this method and most of them have used this method to diagnose their diseases, there are some important issues that are useful to know
First of all, ultrasound is a diagnostic method and no disease can be cured by performing it. Contrary to what many people think, if this method is used in vain, it is not only useless, but sometimes it causes increasing problems. I will explain this by mentioning some examples
Let’s say a person with no thyroid problems gets a thyroid ultrasound and a fellow radiologist reports several three-mm nodules in his thyroid. Then this patient goes to the doctor and he mistakenly requests other diagnostic measures for him, and for a long time this patient gets anxious and confused to find out the significance of these small nodules in his thyroid
Also spend a lot of money and energy. However, small nodules are very common and have no diagnostic value until they become large. On the other hand, thyroid ultrasound is not a diagnostic method for checking healthy people, and this method should not be used without a specific reason