Color ultrasound is not B-ultrasound, color ultrasound includes B-ultrasound. Color ultrasound is equipped with color Doppler function, so it examines a more comprehensive scope. b ultrasound is only able to examine the morphology and structure of organs and the presence of tumors, while color ultrasound is based on b ultrasound to examine the blood flow condition of organs, or the movement of relatively active organs, such as the heart and blood vessels. For example, if a substantial nodule is examined in the liver, ultrasound can only measure the size of the nodule and observe its morphology. Ultrasound, on the other hand, can further detect the presence of vascular supply within the nodule and whether there is abundant blood flow. For example, when examining the heart, ultrasound can only see the shape of the heart and measure the size of the heart, but color ultrasound can further examine the opening and closing of the heart valves, observe the blood flow in the heart, and observe whether there is congenital heart disease, etc. Currently, color ultrasound has largely replaced B-ultrasound because its scope of examination is more comprehensive.