What To Think About

• Producing accurate test results with Doppler ultrasound requires a skilled examiner. The scans are usually read within a short period of time in case repeat tests are needed.
• Because Doppler ultrasound requires a person to hold very still, some children may need to be sedated so that their movements do not interfere with the results.
• Angiography and venography are X-ray tests that require the injection of contrast material. In many cases, Doppler ultrasound may be done instead of angiography or venography because it is faster, less expensive, and noninvasive. If results from a Doppler ultrasound are inconclusive, an angiography or venography test may be done. Angiography is usually more accurate than Doppler ultrasound and is considered the most definitive test for evaluating blood flow through an artery. Magnetic resonance angiography (MRA) and computed tomography angiography (CTA) may be done instead of conventional angiography because these tests are less invasive and easier to perform than conventional angiography. In some cases, venography may be needed to confirm a suspected vein problem. For more information, see the topics Angiogram, Venogram, and Magnetic Resonance Angiogram (MRA).
• A Doppler ultrasound may be used to check many body organs. It can also be used safely during pregnancy.