Diagnostic Medical Sonography News November 2018 | Page 2

What is Diagnostic Medical Sonography?
Ultrasound imaging (sonography) uses high-frequency sound waves to view inside
the body. Because ultrasound images are captured in real-time, they can also show
movement of the body’s internal organs as well as blood flowing through the blood
vessels. Unlike X-ray imaging, there is no ionizing radiation exposure associated with
ultrasound imaging.
Liver Left Lobe Trans
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 so that the ultrasound waves
are transmitted from the transducer through the gel and into the body.
The ultrasound image is produced based on the reflection of the waves off the body
structures. The strength (amplitude) of the sound signal and the time it takes for the
wave to travel through the body provide the information necessary to produce an
image.
What are the Benefits and Risks of DMS?
Ultrasound imaging has been used for more than 50 years and has an excellent
safety record. It is based on non-ionizing radiation, so it does not have the same risks
as X-rays or other types of imaging systems.
Hepatic Veins and IVC
Although ultrasound imaging is generally considered safe when used prudently by
appropriately trained health care providers, ultrasound energy has the potential
to produce biological effects on the body. Ultrasound waves can heat the tissues
slightly. In some cases, it can also produce small pockets of gas in body fluids or
tissues (cavitation). The long-term consequences of these effects are still unknown.
Because of the particular concern for effects on the fetus, organizations such as the
American Institute of Ultrasound in Medicine have advocated for the prudent use of
ultrasound imaging in pregnancy. Furthermore, the use of ultrasound solely for non-
medical purposes, such as obtaining fetal ‘keepsake’ videos, has been discouraged.
Keepsake images or videos are considered reasonable if they are produced during a
medically-indicated exam, and if no additional exposure is required.
Tabitha Quinn, Intern
Internal Carotid Artery
Diagnostic
Medical
Sonography