"Three hundred and sixty professions, the best in each profession." With the development of society, various new industries, new business formats, and new jobs emerge in endlessly. Today, follow the series "Those Novel Professions You Don't Know" to learn about the stories behind relevant practitioners.
In this issue, Xiaojia introduces you to a signal catcher—Dong Hui, a researcher at the Shanghai Institute of Microsystems and Information Technology, Chinese Academy of Sciences.
"Do you know about magnetic resonance imaging (mri) examinations in hospitals? My job is to make this clinical examination equipment smaller, lighter and safer." After 18 years of hard work, Dong Hui gave this paragraph The self-introduction gave a satisfactory answer - his team has successfully developed the first and only multi-channel 0.1 mt ultra-low field MRI system in China. In the future, the equipment is expected to enter more hospitals to provide convenience for patients. Fast diagnostic service.
Clinical prototype test
"My undergraduate major is electronic science and technology, and my Ph.D. is in microelectronics and solid-state electronics. The fields have never changed." Dong Hui said that before studying for a Ph.D., she studied at the University of California, Berkeley, and She is engaged in related research at the Jülich Research Center in Germany. Her overseas scientific research experience has strengthened her determination to join the high-end medical machinery industry in her motherland.
"Magnetic resonance imaging equipment is known as the 'crown jewel of cutting-edge medical equipment', and mobile low-field MRI is an emerging direction for the development of the entire magnetic resonance industry. We hope to solve the problem of mobile MRI with the help of advanced high-performance quantum magnetic sensors to solve the pain points and realize the ‘Made in China’ of high-end medical devices,” Dong Hui said.
Low-temperature core component assembly
At present, the mainstream clinical MRI magnetic field strengths are 1.5t and 3.0t, which are expensive and have strict requirements on the use environment. Low-field MRI is generally less than 0.5t, while the extremely low-field magnetic field strength studied by Dong Hui is only 0.1 mt (1t=1000mt). The construction and operation costs are lower, and it is small and portable, and can be used in doctors' clinics without shielding. "The clinical demand for magnetic resonance imaging is very urgent, especially for emergency patients. We hope that through our research, more people can use MRI in a timely and convenient manner," Dong Hui said.
Quantum magnetic sensor assembly
The low-field MRI signal is extremely weak, and its intensity is only about one hundred millionth of the earth's magnetic field. When the research was first started, various electromagnetic interferences in Shanghai's urban environment completely overwhelmed the low-field MRI signals. "Capturing low-field MRI signals is like finding a place with a size of only 1 square meter across China, and extremely low fields are even more difficult." Dong Hui said that in order to reduce interference, doctoral supervisor researcher Xie Xiaoming led They use the subway outages to carry out experiments. There are only more than 4 hours a day, and late night and early morning are their experiment time. "I don't know how many nights I stayed up, but I finally saw the long-awaited MRI signal at 5 o'clock in the morning. I will always remember the excitement and pride at that time. All the pain and fatigue were worth it at that moment!" Dong Hui said.
With the maturity and popularization of extremely low-field MRI, there is no need to make an appointment, no need to remove metal accessories, no need to pay high fees, and more diseases can be discovered and intervened at an early stage... These possibilities are being changed through the efforts of many scientific researchers. become reality.
Source: Shanghai Jiading
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