2023年12月5日 · A Doppler ultrasound can estimate how fast blood flows by measuring the rate of change in its pitch, also called frequency. A technician trained in ultrasound imaging, called a sonographer, performs the Doppler ultrasound. The sonographer presses a small hand-held device against the skin over the area of your body being examined.

2024年11月12日 · The ultrasound wand goes through the catheter and moves near the heart. The wand gives off sound waves. It records the sound waves that bounce back from the heart. A computer changes the information into moving images. The images are seen on a monitor. A healthcare professional watches your oxygen level during the test. Stress echocardiogram

2024年5月3日 · Diagnostic ultrasound is a safe procedure that uses low-power sound waves. There are no known risks. Ultrasound is a valuable tool, but it has limitations. Sound waves don't travel well through air or bone. This means ultrasound isn't effective at imaging body parts that have gas in them or are hidden by bone, such as the lungs or head.

2024年11月5日 · An abdominal ultrasound exam takes about 30 minutes to complete. After the procedure. You should be able to return to regular activities right after an abdominal ultrasound. Results. After an abdominal ultrasound, your healthcare professional shares the results with you at a follow-up visit. Or you may get a call with the results.

2025年1月15日 · The ultrasound technician may use a Doppler ultrasound, which shows blood flowing through the arteries. In a Doppler ultrasound, the rate of blood flow is translated into a graph. There have been many advances in carotid ultrasounds to improve the quality and resolution of the images. A carotid ultrasound usually takes about 30 minutes.

2023年6月24日 · The image below is from a 3D fetal ultrasound. This type of ultrasound can make images that are clearer and more detailed than standard fetal ultrasound images. A 3D fetal ultrasound is sometimes used to detect facial problems, bone problems or neural tube defects. Some companies offer 3D ultrasounds outside of medical settings.

An ankle-brachial index number in this range indicates a diagnosis of PAD. You might have more testing, such as ultrasound or angiography, to view the arteries in your legs. People with hard-to-control or long-standing diabetes or significantly blocked arteries might need to have a blood pressure reading at the big toe to get an accurate test ...

2024年8月9日 · Ultrasound of the legs or feet. Sound waves create pictures of how blood moves through the blood vessels of the legs or feet. Doppler ultrasound is a special type of ultrasound used to spot blocked or narrowed arteries. Angiography. This test uses imaging tests and a dye to look for blockages in the arteries. The dye is given through a blood ...

2024年2月6日 · To diagnose varicose veins, a healthcare professional might use a test called a venous Doppler ultrasound of the leg. It's a painless test that uses sound waves to look at blood flow through the valves in the veins. A leg ultrasound can help find a blood clot.

Doppler ultrasound. A healthcare professional may use a special ultrasound device to check blood flow at different points in your body. The test results show the speed of blood flow in the arteries. This can reveal any narrowed areas. Ankle-brachial index (ABI). This test compares the blood pressure in the ankle with that in the arm.