This test is also referred to as anultrasoundor sonogram.
A computer translates the ultrasound waves into an image.
A trained technician can see, measure, and identify structures in the image.
Verywell / Emily Roberts
A healthcare provider then reads the images to help diagnose the issue or problem at hand.
This article explains the purpose and limitations of sonography.
To demystify the test, this article also explains what to expect before and during the test.
It functions like a camera that takes pictures of body parts or processes in real time.
Traditionally, ultrasound imaging is great for looking into the abdomen without having to cut it open.
Sonography can also recognize blood or fluid flow that moves toward or away from the transducer.
It uses color overlays on the image to show the direction of the flow.
Magnetic resonance imaging (MRI)uses an extremely strong magnet to capture an image.
What Is the Difference Between Ultrasound and Sonography?
Ultrasound and sonogram are slightly different terms used to refer to the same procedure.
Ultrasound imaging, based on sound waves, describes the process itself.
The sonogram is the image that an ultrasound generates.
Precautions and Risks
A sonogram is a noninvasive imaging test that has no known complications.
Ultrasound waves are thought to be harmless.
Before the Test
Healthcare providers order sonography as a first-line test, usually together with blood tests.
double-check you ask your provider if you should follow any special instructions before your sonogram.
The answer may change depending on the purpose of the test.
Timing
A sonogram usually doesnt take longer than 30 minutes.
The provider then shares the results with the patient.
Location
Sonography is done at most imaging centers, hospitals, and some obstetrics offices.
The sonography machine looks a bit like a computer with a microphone attachedalmost like a Karaoke machine.
Usually, the sonography machine is rolled right up to the bedside.
What to Wear
Wear something comfortable and easy to remove to your sonogram appointment.
In most cases, you will have to expose only the skin that the technician needs access to.
An abdominal ultrasound, for example, can be done while you wear pants and a shirt.
You’ll just have to pull your shirt up and away to expose your abdomen.
Cost and Health Insurance
Sonography is a relatively inexpensive imaging test.
A 3D or 4D sonogram is an elective test that some expectant parents get during pregnancy.
These are known as entertainment tests and are not covered by most health insurance policies.
Is a Sonogram Safe for a Baby When You’re Pregnant?
During the Test
In many cases, a sonogram is over before you know it.
The technician will coat the transducer with conductive gel, which feels like lubricant jelly.
If possible, depending on the tools and supplies available, the gel will be warm.
Then the technician will slide the transducer over the skin, sometimes with firm pressure.
Occasionally, the pressure can cause mild discomfort.
The lines help measure size, like a virtual yardstick.
You should be able to watch the entire procedure and even ask questions throughout the procedure.
There are no special instructions or side effects to manage.
Interpreting the Results
It often takes a radiologist only a few minutes to interpret a sonogram.
Typically, sonogram results are sent to the healthcare provider to share with a patient.
For many expectant parents, this makes the entire trip worthwhile.
The live image that a sonogram captures is a painless procedure as well as a quick one.
In many cases, a sonogram takes no more than 30 minutes from start to finish.
A Word From Verywell
Sonography is one of the most noninvasive diagnostic medical tests available.
It is a safe option for patients who need to know what is going on inside their bodies.
If images are necessary, ask your healthcare provider if ultrasound is an option for you.
Frequently Asked Questions
Most sonographers complete a two-year degree in an accredited sonography training program.
Additionally, they may complete the American Registry for Diagnostic Medical Sonography (ARDMS) certification exams.
Radiology professionals use imaging that relies on radiation, while sonography is a technology based on sound waves.
2017;13(5):1932-1936. doi:10.3892/etm.2017.4209.
American Pregnancy Association.Ultrasound: Sonogram.
U.S. Food and Drug Administration.Ultrasound imaging.
Whitson MR, Mayo PH.Ultrasonography in the emergency department.Critical Care.
2016;20:227. doi:10.1186/s13054-016-1399-x.
American College of Obstetricians and Gynecologists.Ultrasound in Pregnancy.
American Registry for Diagnostic Medical Sonography.How to Become a Sonographer.
