Unlike X-ray imaging, Utrasound imaging does not use ionizing radiation exposure. Ultrasound imaging (sonography) uses sound waves at ultra high-frequency to view organs inside the body. Since ultrasound images are captured in real-time, they can also show the movment of the body’s internal organs as well as blood flowing through the blood vessels.
In an ultrasound exam, a transducer (probe) is placed directly on the skin or inside a body opening. A thin layer of gel is applied to the skin to increase the ultrasound waves transmittion from the transducer through the gel into the body.
The ultrasound image is generated based on the reflection of the waves off from the body structures. Using the strength of the sound signal and the time taken for the wave to travel through the body and back to the transducer, the image can be produced.