Ultrasound
An ultrasound exam uses high-frequency sound waves to visualize soft-tissue organs in the body without the use of radiation. Sound waves are produced by a transducer that is gently moved across the skin. When these sound waves reach various tissue depths in the body, echoes are produced, and they are sent back to the transducer, which electronically converts them into an image displayed on a video screen.
Is ultrasound safe?
No harmful effects from diagnostic ultrasound have been identified.
What does the exam involve?
An ultrasound is a painless procedure during which you lie comfortably on an examination table. Using a water-soluble gel, the technologist begins scanning by moving a transducer gently across the skin. The images created will be reviewed by the radiologist.
Once the radiologist reviews and interprets your images, the results will be sent to your health care provider.
Preparations for ultrasound
| Exam area |
Approximate length of exam |
| Abdomen |
45 minutes |
Includes gallbladder, liver, pancreas, spleen, and kidneys. Fat-free diet the night before the study. Nothing by mouth after midnight.
No food or liquid. |
| Obstetrical biophysical profile |
45 minutes |
| A full bladder is needed to properly visualize the uterus. Empty your bladder, then drink 36 ounces of water one hour prior to the exam. Do not empty your bladder until after the exam. |
Pelvic/transvaginal
|
60 minutes |
| A full bladder is needed to properly visualize the uterus. Empty your bladder, then drink 36 ounces of water one hour prior to the exam. Do not empty your bladder until after the exam. |
| Breast |
30 minutes |
| No preparation is necessary. |
Thyroid
|
30 minutes |
| No preparation is necessary. |
What are the uses for ultrasound?
Obstetrical ultrasound
Ultrasound is used to determine the position, approximate age and the well-being of the fetus.
Other uses
Other areas of the body commonly studied are the liver, gallbladder, pancreas, kidneys, thyroid, breasts and pelvic area.
Ultrasound studies are available for children under age 12; call (541) 789-6150 for details.
