Terahertz(THz)technology offers novel opportunities in biology and medicine,thanks to the unique features of THzwave interactions with tissues and cells.Among them,we particularly notice strong sensitivity of THz wave...Terahertz(THz)technology offers novel opportunities in biology and medicine,thanks to the unique features of THzwave interactions with tissues and cells.Among them,we particularly notice strong sensitivity of THz waves to the tissue water,as a medium for biochemical reactions and a main endogenous marker for THz spectroscopy and imaging.Tissues of the brain have an exceptionally high content of water.This factor,along with the features of the structural organization and biochemistry of neuronal and glial tissues,makes the brain an exciting subject to study in the THz range.In this paper,progress and prospects of THz technology in neurodiagnostics are overviewed,including diagnosis of neurodegenerative disease,myelin deficit,tumors of the central nervous system(with an emphasis on brain gliomas),and traumatic brain injuries.Fundamental and applied challenges in study of the THz-wave–brain tissue interactions and development of the THz biomedical tools and systems for neurodiagnostics are discussed.展开更多
To accurately diagnose the aging condition of the vehicle-mounted high-voltage cable terminals under the combined electro-thermal stress,this paper proposes a terahertz frequency spectrum technology-based method.First...To accurately diagnose the aging condition of the vehicle-mounted high-voltage cable terminals under the combined electro-thermal stress,this paper proposes a terahertz frequency spectrum technology-based method.First,an electro-thermal aging platform is established in the laboratory to obtain the test samples of ethylene-propylene rubber(EPR)cable terminals with different aging gradients.Then,the degree of electro-thermal aging is characterized by frequency spectrum,absorption coefficient spectrum,absorption spectrum,refractive index and dielectric constant in the terahertz domain.Moreover,the micro-morphology and micro-area structure of the test samples under different aging gradients are also observed by scanning electron microscopy,and both the material and chemical properties are analyzed.The findings demonstrate that terahertz frequency spectra offer significant benefits in non-destructively detecting and identifying the insulation condition of vehicle cable terminals during electro-thermal aging.Laboratory tests confirm the feasibility of utilizing the terahertz frequency spectrum to assess the insulation aging state of EPR cable terminals,making it potentially applicable for on-site purposes.展开更多
基金The work was supported by the Russian Science Foundation,Project#22-22-00596.
文摘Terahertz(THz)technology offers novel opportunities in biology and medicine,thanks to the unique features of THzwave interactions with tissues and cells.Among them,we particularly notice strong sensitivity of THz waves to the tissue water,as a medium for biochemical reactions and a main endogenous marker for THz spectroscopy and imaging.Tissues of the brain have an exceptionally high content of water.This factor,along with the features of the structural organization and biochemistry of neuronal and glial tissues,makes the brain an exciting subject to study in the THz range.In this paper,progress and prospects of THz technology in neurodiagnostics are overviewed,including diagnosis of neurodegenerative disease,myelin deficit,tumors of the central nervous system(with an emphasis on brain gliomas),and traumatic brain injuries.Fundamental and applied challenges in study of the THz-wave–brain tissue interactions and development of the THz biomedical tools and systems for neurodiagnostics are discussed.
基金supported in part by the National Natural Science Foundation of China(52167018)Opening Foundation of the National Rail Transportation Electrification and Automation Engineering Technology ResearchCenter(NEEC-2022-B19).
文摘To accurately diagnose the aging condition of the vehicle-mounted high-voltage cable terminals under the combined electro-thermal stress,this paper proposes a terahertz frequency spectrum technology-based method.First,an electro-thermal aging platform is established in the laboratory to obtain the test samples of ethylene-propylene rubber(EPR)cable terminals with different aging gradients.Then,the degree of electro-thermal aging is characterized by frequency spectrum,absorption coefficient spectrum,absorption spectrum,refractive index and dielectric constant in the terahertz domain.Moreover,the micro-morphology and micro-area structure of the test samples under different aging gradients are also observed by scanning electron microscopy,and both the material and chemical properties are analyzed.The findings demonstrate that terahertz frequency spectra offer significant benefits in non-destructively detecting and identifying the insulation condition of vehicle cable terminals during electro-thermal aging.Laboratory tests confirm the feasibility of utilizing the terahertz frequency spectrum to assess the insulation aging state of EPR cable terminals,making it potentially applicable for on-site purposes.
