Bidirectional acoustic negative refraction based on a pair of metasurfaces with both local and global PT-symmetries
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DOI: 10.1038/s41598-020-67793-x
Abstract: Negative refraction plays an important role in acoustic wave manipulation and imaging. However, conventional systems based on acoustic metamaterials suffer from the limits induced by loss-related and resolution issues. In this work, a parity-time (PT)-symmetric… read more here.
Keywords: pair; negative refraction; acoustic negative; refraction based ... See more keywords
Speckle reduction in ultrasound endoscopy using refraction based elevational angular compounding
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DOI: 10.1038/s41598-021-97717-2
Abstract: Endoscopic ultrasonography (EUS) is a safe, real-time diagnostic and therapeutic tool. Speckle noise, inherent to ultrasonography, degrades the diagnostic precision of EUS. Elevational angular compounding (EAC) can provide real-time speckle noise reduction; however, EAC has… read more here.
Keywords: based elevational; refraction based; angular compounding; speckle reduction ... See more keywords