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ULTRASOUND Frequently Asked Questions Is ultrasound like an X-ray? Does it use radiation? No, an ultrasound uses high frequency sound waves to produce images of internal organs. Why is gel applied on the skin and is it cold? Gel, often kept in a warmer, provides better contact between the transducer and the skin to help transmit the sound. Does an ultrasound hurt? Ultrasound examinations are harmless and there is no pain involved, although discomfort may be felt from maintaining a full bladder in the obstetrical and pelvic ultrasounds. Why do I have to drink water for pelvic and obstetrical ultrasounds? When the bladder is full, sound waves can travel through it easier. Why do I have to fast for my abdominal ultrasound? Ultrasounds do not travel well through air or gas, so by not eating for 12 hours, the amount of gas is reduced. How long does the ultrasound take? An ultrasound usually takes between 30 and 60 minutes, depending on the type being performed. When will my physician get the results? The report will take one to two weeks before it is sent to the patient's physician. A radiologist receives and interprets the ultrasound images performed by the sonographer. What is Doppler? The Doppler is a type of ultrasound that is used to detect the presence or absence and the characteristics of the blood flow. If my ankle is swollen, why will the ultrasound be performed on my thigh during Deep Vein Thrombosis? This procedure, commonly used to uncover blood clots in the leg, is performed on the thigh because the veins from the groin to just below the knee are larger and easy to access.  Back to top |
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