Regarding the risks, Li Jianguo, president of the Chinese Society of Ultrasonic Medical Engineering and director of the Department of Ultrasound of Peking University People's Hospital, clearly stated that routine prenatal ultrasound examination is necessary and should be advocated, but excessive use, high sound power, too long time and too many times may have a potential impact on fetal development. And this effect may be slow, and it will take several generations to be discovered.
20 14, 14 In February, the FDA of the United States issued a statement strongly opposing taking pictures of the fetus. Dr. Shahram, a biomedical engineer, said: Ultrasound can heat human tissues, and in some cases, it can also produce very small bubbles. This temperature rise and small bubbles may affect the normal development of embryos.
Extended data
Detection principle
Ultrasonic wave has shorter wavelength than ordinary sound wave, better directivity and can penetrate opaque substances. This characteristic has been widely used in ultrasonic flaw detection, thickness measurement, distance measurement, remote control and ultrasonic imaging technology. Ultrasonic imaging is a technology that uses ultrasonic waves to present the internal image of opaque objects.
The ultrasonic wave emitted by the transducer is focused on the opaque sample through the acoustic lens, and the ultrasonic wave emitted by the sample carries the information of the irradiated part (such as the ability of reflecting, absorbing and scattering sound waves), and is concentrated on the piezoelectric receiver through the acoustic lens, and the obtained electric signal is input into the amplifier, and the image of the opaque sample can be displayed on the fluorescent screen by using the scanning system.
People's Daily Online-Abuse of four-dimensional color Doppler ultrasound may endanger fetal development