German scientists have successfully developed the smallest ultrasonic detector in history, which is not only smaller than blood cells, but also opens up new possibilities for super-resolution imaging. < / P > < p > it is understood that the new device developed by the Helmholtz Munich center and the Munich University of technology represents a technology different from that behind traditional ultrasound imaging, which usually relies on piezoelectric devices – the pressure generated by ultrasound turns it into a voltage. The image quality produced by this method is directly related to the size of the piezoelectric detector. The smaller the detector is, the higher the resolution is, but this in turn will damage the sensitivity of the device. But in the new study, the researchers turned to an imaging technology that relies on silicon photonics. It is understood that silicon photonics technology has great potential in the fields of next generation computing and data transmission, which can assemble micro optical components on small silicon chips. Silicon can limit light to a very small range, and scientists can use this ability to make their groundbreaking devices. < / P > < p > this device, called a silicon waveguide etalon detector (Swed), works by capturing changes in light intensity as light travels through small photonic circuits, rather than tracking voltage through piezoelectric crystals. The team said the device is smaller than blood cells, marking the first time that a detector of this size has been used to detect ultrasound. < p > < p > professor Vasilis ntzia Christos from the Technical University of Munich, who led the research team, pointed out that the use of silicon photoelectron technology enabled them to miniaturize the new detector while maintaining high sensitivity. The size of the Swed device is about 0.5 μ m, which is at least 10000 times smaller than the smallest piezoelectric detector used in clinic, which enables it to image features less than 1 μ M. This method, called super-resolution imaging, can be applied to cells and tissues. It will not only open up new possibilities for biomedical research and clinical diagnosis, but also allow ultrasound to be studied in a way that was impossible in the past. “The detector was originally developed to promote photoacoustic imaging performance, which is our main research focus at the Helmholtz Munich center and the University of Munich,” said ntzia Christos. However, we now foresee that it will be used in a wider range of sensing and imaging fields. ” Chinese version of K-car: reading a10e design drawing exposure

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