It is often thought that the terms “sonogram” and “ultrasound scan” can be used interchangeably; however, by definition, they cannot. Rather, ultrasound scan is the means to obtain a sonogram, that is, a sonogram is the end result of an ultrasound scan.
What is an ultrasound scan?
This is a diagnostic imaging procedure that makes use of ultrasound – which is sound at a frequency of around 20 kHz that is beyond the range heard by humans – to generate images of the inside of the body.
People commonly use the words “sonogram” and “ultrasound” to refer to the ultrasonography technique.
Ultrasound scans allow medical experts to look into organs such as the liver, heart, and kidney.
As the high-frequency sound passes through tissues and fluids of the body, it bounces back (echoes) when it hits denser surfaces.
What is a sonogram?
This echo that is generated translates into an ultrasound image with visible features; the different density the sound has met is shown by the varying shades of grey seen on the image (the sonogram).
Using the sonogram, physicians can observe foetal growth, age, and due date. Other internal ‘situations’ might also be examined, such as pelvic bleeding and cancer.