Basic Concepts
Sonography is derived from the words sound, meaning sound, and graphic, meaning image and drawing.
Physiology
Ultrasound is one of the most common diagnostic methods in medicine. This method is also called echography, echography and acoustics. This method is based on ultrasound waves and is used to examine subcutaneous tissues such as muscles, joints, tendons and internal organs of the body and their lesions. Ultrasound also has therapeutic applications. Today, one of the most important tools in diagnosing the condition of the fetus during pregnancy is the use of ultrasound.
How does it work?
In ultrasound, images are created using ultrasound waves (high-frequency, inaudible sound waves). In this procedure, a device called a transducer is moved over the skin (in some cases it is inserted into the pores of the body and rectum) and ultrasound waves are sent into the body. Wherever tissues of different densities meet or wherever tissue is next to a liquid, waves are reflected.
The transducer receives these waves and transmits them to the computer to create images on the display. These images are constantly changing, so you can see the movement. Doctors often use ultrasound to see the fetus in the uterus or the walls and valves of the heart or to identify abnormalities such as liver and gallbladder problems, cysts and urinary stones.
Color Doppler sonography
Another type of ultrasound is color Doppler sonography. This method, which shows the direction and speed of blood flow, is used to identify problems such as narrowing of the arteries or blood clots.
So nography components
The sonography device consists of the following components:
1- Probe
2- Monitor, reflected images of sound waves can be seen on it.
Advantages, disadvantages and limitations
Ultrasound is a non-invasive and often painless procedure (because it does not use needles or injections). On the other hand, it does not use radiation and provides images that are of higher quality than x-rays. On the other hand, it does not cause health problems and can be repeated many times if necessary.
Device Types
Advances in ultrasound technology include 3D ultrasound (which produces sound wave information in the form of 3D images), 4D, which is a type of 3D and simultaneously measures movement in real time, and that can be part of a Ultrasound examination. A special ultrasound method evaluates blood flow along the body’s vessels, including the main arteries and veins in the abdomen, limbs, and neck. https://t.me/joinchat/LGFNuFbsiWDOnIal9Q65LA
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