The origin and price development stage of four-dimensional color ultrasound equipment. Since 2010, four-dimensional color ultrasound equipment has gradually become popular in the medical industry, and its price has also shown a downward trend year by year. According to market research, it can be seen that the price of four-dimensional color ultrasound equipment is affected by factors such as brand, function, configuration, etc. Purchasers need to make choices based on their own needs. At first, the price of four-dimensional color Doppler ultrasound