Sonogram vs Ultrasound – What is the difference?

Most people use the terms ‘ultrasound’ and ‘sonogram’ on an interchangeable basis. It may however be noted that that the two are different from each other, albeit very slightly, when identified as per their definitions.

In technical terms, ultrasound can be defined as a sound of very high frequency that cannot be detected by the normal frequency range of the human ear, usually in the range between 20 Hz and 20,000 Hz. Hence, it is not audible to the naked ear. It is used in the method of sonogram or ultrasonography, i.e., reflections of sound waves of high frequency.

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Sonogram, on the other hand, can be technically defined as an image of any organ/structure created with the use of ultrasound or ultrasonography. It is used to study different organs in the body as well as observe the growth of a fetus.

Differences between sonogram and ultrasound



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  • During a sonogram procedure, the waves of ultrasound get transferred through the body. These waves bounce or deflect between and off the borders of organs and the surrounding liquid/fluid as well as between the areas with varied tissue density. These deflections are combined by the doctor with their known factual knowledge about the interior human anatomy for analysis and relevant conclusions.
  • Ultrasound is used to create security systems for automobiles.
  • Ultrasound can help determine the purity and uniformity of a variety of solids and liquids. It therefore has diverse uses in different industries.
  • Whales, dolphins, and other underwater creatures make use of ultrasound for varied purposes, including detection of objects/food below the water.
  • Sonar systems use ultrasound technology to ascertain the depth of water in a certain region. Ultrasound can also help detect the presence of large schools of fish, buried treasures, as well as submarines, etc.



  • The individual who performs the sonogram procedure is referred to as a sonographer.
  • Doctors can use a sonogram procedure to ascertain the occurrence of specific conditions which may affect the health of the fetus or cause it discomfort or distress.
  • A sonogram procedure helps in identifying the fetus’ gender as well as verify the occurrence of twins, triplets, etc. Such information can also help parents prepare in advance for the arrival of the child, including buying clothes, toys, etc.
  • Sonogram can help ascertain the gestational period, i.e., the period beginning from fertilization, which can then be used to determine the gestational age of the fetus and the expected date of delivery.
  • A sonogram can also be used to gather numerous critical data related to pregnancy such as possible occurrence of complications, the need for a cesarean birth, etc.
  • Sonogram is not something that can be beneficially used only by expectant women. It can also be used by different people to diagnose the presence of underling organ problems or conditions. For example, it can be used to detect malignant cells; verify prostate enlargement or prostate problems in men; as well as check for menstrual abnormalities or pelvic bleeding, etc.
  • As opposed to other diagnostic procedures such as X-rays, CT scans, and fluoroscopy, etc., a sonogram procedure is a much safer option.
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