Now ultrasound can also be done with laser, skin will not be harmed; Accurate report will be found

Researchers have developed a laser system that protects the eye and skin as an alternative to traditional ultrasound. It is a system that can take a clear picture of the inner parts of the patients and also has less risk. Scientists at the Massachusetts Institute of Technology (MIT) in the US said that traditional ultrasound requires devices to contact the patient's body. This has a limitation in its use, because young children, patients with sensitive skin or burnt bodies are not able to get a thorough examination.

Researchers refer to a laser ultrasound image for humans in the current study published in the journal Light Science and Application. He scanned several volunteers' wrists and observed similar features in muscle, fat and bone tissue up to about six centimeters below the skin.
(Source: MIT News) 
These images of volunteers were taken using a laser from a distance of about half a meter and were all the same as traditional ultrasound. Brian W. Anthony, a senior researcher at MIT, said the laser is in the early stages of achieving success with ultrasound. He said, "Just imagine how good it is when we will be able to do ultrasound of different parts of the body with just one point of light and the biggest thing is that there is no harm to the skin in this process. This will be a new way of detecting tissue characteristics. In this, we will also need to make any device contact with the patient's body. '

How Study done ? 

During the study, the researchers sent light through the laser to the skin in a special wavelength, which is absorbed by the blood vessels. The blood vessels dilate and cool as the laser is heated, then return to its original size. This happens until the second wave impulse of the laser enters it. This causes mechanical vibrations to produce sound waves, which come back upward, where the signal-catching device in the skin detects it and transforms it into an image. However, the researchers say that this technique still requires the detector to have direct contact with the body to detect sound waves.

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