What is a Ultrasound?
Ultrasound uses high-frequency sound waves — not radiation — to create real-time images of soft tissue, organs, blood vessels, and blood flow.
It's commonly used to evaluate the abdomen, pelvis, thyroid, breast, and musculoskeletal structures, and it's the standard imaging tool during pregnancy.
Before your appointment
What to wear
Comfortable, loose clothing that gives easy access to the area being scanned. You may be asked to change into a gown.
Eating and drinking
For abdominal ultrasound, avoid eating or drinking for 4–6 hours beforehand so the gallbladder is visible. For pelvic ultrasound, drink 32 oz of water an hour before and do not use the restroom — a full bladder improves image quality. For most other studies there are no restrictions.
Medication
Take all medications as usual unless your provider specifies otherwise.
What to bring
- Photo ID
- Insurance card or attorney lien paperwork
- Your prescription or referral
- Prior ultrasound or imaging on CD if from outside our network
The day of your scan
Arrival and check-in
Arrive 10 minutes early to complete check-in. Follow any fasting or full-bladder instructions you received in your appointment confirmation.
What happens during the scan
A sonographer applies a warm gel to your skin, then moves a handheld transducer (probe) over the area being imaged. The gel conducts the sound waves and you'll see the images appear on a monitor in real time. The exam is painless; you may feel mild pressure as the sonographer presses to get the best angle.
How long it takes
Most exams take 20–45 minutes depending on the number of structures being evaluated.
After your scan
Wipe off any remaining gel and resume normal activities immediately. A board-certified radiologist will interpret the images and send a report to your ordering provider, typically within 24 hours.
Common concerns
Discomfort from a full bladder
For pelvic studies, a full bladder is necessary for good image quality. The sonographer will let you use the restroom as soon as the required images are captured.
Transvaginal ultrasound
Some pelvic studies require an internal (transvaginal) scan for a clearer view. Your sonographer will explain the procedure and obtain your consent before proceeding. The exam uses a slim, covered probe and causes minimal discomfort.
Pregnancy
Ultrasound is considered safe throughout pregnancy and is the preferred imaging modality for monitoring fetal development. There is no ionizing radiation.
Frequently asked questions
Does ultrasound use radiation?
No. Ultrasound uses sound waves only, making it safe for pregnant patients and repeated imaging.
Will it hurt?
No. You may feel mild pressure as the transducer is pressed against your skin, but the exam is painless.
Do I really need a full bladder?
For pelvic ultrasound, yes — a full bladder lifts the bowel and provides an acoustic window to see the uterus and ovaries clearly. Follow your prep instructions.
Can I see the images during the exam?
Yes. The sonographer will point out relevant structures on the monitor as the exam progresses.
How soon will I get results?
A radiologist typically reads your study within 24 hours. Your ordering provider will share the report with you.
Schedule your Ultrasound
Find a location near you offering Ultrasound, or book online 24/7.
Safety information for your Ultrasound
Read these before your appointment if any apply to you.