ARDMS Practice Test 2025 – Complete Exam Prep Guide

Doppler ultrasound measures the change in frequency of sound waves due to motion, making it a powerful tool for assessing blood flow and detecting abnormalities in the circulatory system. This phenomenon is based on the Doppler effect, where sound waves are compressed or stretched depending on whether the source of the sound is moving toward or away from the observer. In the context of medical imaging, this allows technologists and physicians to determine the speed and direction of blood flow, which is crucial for diagnosing conditions such as blockages, clots, and heart valve issues.

While the ability to measure tumor size, assess blood pressure, and visualize blood distribution in organs are important aspects of medical imaging and diagnostics, they are not the primary functions of Doppler ultrasound. Instead, the key focus of this technique lies in evaluating the dynamic changes in frequency that occur with moving blood cells, thereby providing insights into cardiovascular health.