Thyroid ultrasound examination, also known as thyroid color Doppler blood flow imaging, is an indirect detection of the thyroid gland using an ultrasound probe. Through thyroid color ultrasound, the morphology and structure of the thyroid can be displayed. When thyroid lesions occur, many lesions can be detected by ultrasound examination, making it the preferred examination method for diagnosing thyroid diseases in clinical practice.

Cardiac Doppler ultrasound examination can be divided into two methods: echocardiography and color Doppler echocardiography. Echocardiography mainly sends ultrasound into the body through a probe, and then generates a heart image through reflected signals. Through this method, the size, thickness, and shape of the heart can be checked. Color Doppler echocardiography, on the other hand, is based on echocardiography for Doppler measurement, which can study functions such as blood flow velocity and blood flow. Color Doppler can display color images of the heart, allowing doctors to display the blood flow of the heart more clearly. They can also view the size and proportion of the four chambers of the heart, as well as the opening and closing of the heart valves, in order to detect diseases such as heart valve diseases, infarcts at different locations of the heart, and abnormal cardiac hemodynamics.