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An ultrasonic transducer is a device capable of converting electrical energy into sound energy or vice versa. Medical ultrasonic transducers are divided into two categories, one type is connected to the host machine of ultrasonic diagnosis and monitoring equipment, and the other type is connected to the host machine of ultrasonic treatment and surgical equipment; the former is used with electrical shielding and mechanical protection shells and integrated cables, etc. The whole is called a probe, and the latter, together with additional parts and integrated cables, is called a treatment head. Among them, the ultrasonic probe can transmit and receive ultrasound, perform electroacoustic signal conversion, convert the electrical signal sent by the host into a high-frequency oscillating ultrasonic signal, and can also convert the ultrasonic signal reflected back from the tissues and organs into an electrical signal and display it on the on the host monitor. Since the 1990s, in terms of probes, new materials and new transducers have been continuously introduced, such as high-frequency probes, cavity probes, and high-density probes. The single ultrasound probe used in low-end products is usually less than 30,000 yuan, the mid-range price is 40,000-50,000 yuan, and the high-end price is 100,000 yuan. Among them, the price range of ultrasonic probes dedicated to obstetrics and gynecology is 300,000-400,000 yuan. The signal chain chip is currently the high-tech barrier and domestic breakthrough point for ultrasonic probes.
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