Ultrasound is a non-invasive and non-irradiating imaging technique used to produce pictures of specific areas inside the body using targeted propagation of sound waves.
This exam allows the visualization of organs such as the liver, the spleen, the kidney or the heart. The ultrasound device sends ultrasound waves of different frequencies to the tissues which reflect part of the sound waves back to a special sensor.
The device analyzes the time delay needed by the sound waves to travel back to the sensor and the strength of the waves. With this information, a computer reconstructs an image that is visualized on a monitor.
Doppler ultrasound is a technique often used to visualize blood vessels. It is used to visualize arteries of the neck, abdominal vessels and the lower limb vessels.
The exam typically lasts 15 minutes.
Preparation for your exam
- Begin fasting the night preceding the exam.
- Avoid smoking and chewing gum. Avoid drinking water, except as needed for taking your medication.
- Drink 750 ml of liquid 90 minutes before the exam and refrain from urinating afterwards.