Medical Application of Ultrasound
Medical Application of Ultrasound
Ultrasound : Sound waves eoth frequencies higher thanthe upper audible limit of human hearing are called ultrasound. The limit varies from person to person but is approximately 20,000 Hertz. The physical properties of ultrasound are similar to the normal audible sound.
1. In Internal investigation of Human Body: Ultrasound is used to investigate the internal organs of human body such as liver, gall bladder, pancreas, kidneys, uterus and heart, etc. Ultrasound waves can penetrate the human body and different types of tissues and get reflected in different ways from a region where there is a change of tissue density. In this way, ultrasound helps us to see inside the human body and to give pictures of the inner organs by converting into electrical signals. These pictures or images are then displayed on a monitor or printed on a film. This technique is called ultrasonography.
Ultrasonography is used for the examination of foetus during pregnancy to detect any growth abnormalities, which helps in taking the necessary action to rectify the abnormalities.
2. Ultrasound is also used in the evaluation of blood flow in the blood vessels.
3. Can also be used for assessment of thyroid gland in our neck.
4. Ultrasonic scanner is an instrument that helps the doctor to detect abnormalities, such as stones in the gall bladder and kidney or tumours in different organs and many other ailments. Ultrasound is also used for diagnosing heart diseases by scanning the heart from inside. This technique is echocardiography.
5. Ultrasound may be employed to break small stones formed in the kidneys into fine grains which later get flushed out with urine. This way, the patient gets relief from pain.This is known as lithotripsy.
_______________ is used for the examination of foetus during pregnancy to detect any growth abnormalities, which helps in taking the necessary action to rectify the abnormalities. | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct : (a) Sound waves frequencies higher than the upper audible limit of human hearing are called ultrasound. (b) Ultrasound is used to investigate the internal organs of human body such as liver, gall bladder, pancreas, kidneys, uterus and heart, etc. (c) Infrasonic sound is used to investigate the internal organs of human body such as liver, gall bladder, pancreas, kidneys, uterus and heart, etc. | |||
| Right Option : A | |||
| View Explanation | |||
________________is used for detecting the fault in metal sheets, imaging marine depths and detecting distances | |||
| Right Option : C | |||
| View Explanation | |||
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