A system and method for enhancing the signal intensity of biological tissue terahertz wave imaging by using an alternating magnetic field
A technology for biological tissue and imaging signals, applied in applications, medical science, sensors, etc., can solve the problems of difficult application of pulsed terahertz wave imaging systems, high purchase and maintenance costs, complex system structure, etc. , Improve the effect of penetration depth
Active Publication Date: 2017-02-22
北京远大恒通科技发展有限公司
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Problems solved by technology
However, the imaging signal intensity of biological tissues and the imaging contrast between different tissues, especially diseased tissues and normal tissues, need to be further improved; moreover, most of the existing terahertz wave imaging systems for biological tissues are pulsed terahertz wave imaging systems, with system The shortcomings of complex structure, low stability, long imaging time, and high purchase and maintenance costs; at the same time, due to the large absorption of water vapor in the air in the frequency band corresponding to the pulsed terahertz wave, it is difficult for the pulsed terahertz wave imaging system to be used in the actual environment. In addition, because biological cells contain more water, water absorbs more in the frequency band corresponding to the pulsed terahertz wave, so pulsed terahertz wave imaging is often powerless to deep biological tissues
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Embodiment 1
[0026] (1) Use Gunn oscillator 1 to emit 0.2THz terahertz waves, which are reflected by the first metal plane mirror 6 to the tumor cell fluid on the translation stage 5 for irradiation, and are sequentially reflected by the tumor cell fluid, the second metal plane mirror 7 and the parabolic mirror 8 Then it reaches the pyroelectric detector 2 to detect the signal strength of the terahertz wave;
[0027] (2) After the alternating power supply 3 is turned on, the induction coil 4 generates an alternating magnetic field of 285 kHz, and the Gunn oscillator 1 is used to transmit a 0.2 THz terahertz wave, which is reflected by the first metal mirror 6 to the tumor cell fluid on the translation stage 5 for irradiation. , and after being reflected by the tumor cell fluid, the second metal plane mirror 7 and the parabolic mirror 8 in turn, it reaches the pyroelectric detector 2 to detect the terahertz wave signal intensity;
[0028] (3) The superparamagnetic iron oxide nanoparticles w...
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The invention relates to a system and method for enhancing the biological tissue terahertz wave imaging signal intensity by the utilization of an alternating magnetic field. The system comprises a terahertz wave generator, terahertz wave explorers, a first metal plane mirror, a second metal plane mirror, parabolic mirrors, a horizontally moving platform, an alternating power source and an induction coil. The horizontally moving platform is arranged in the induction coil. The induction coil is connected with the alternating power source. A fixed included angle is formed between the back face of the first metal plane mirror and the back face of the second metal plane mirror. The first metal plane mirror and the second metal plane mirror are arranged above the induction coil. The other side of each metal plane mirror is provided with one parabolic mirror. One side of each parabolic mirror is provided with one terahertz wave explorer. The imaging system is simple in structure, high in stability and low in purchase and maintenance expense. By the adoption of the method, the imaging speed and imaging signal intensity are high.
Description
technical field [0001] The invention relates to the biological tissue imaging application field of terahertz waves, in particular to a system and method for enhancing the signal strength of biological tissue terahertz waves by using an alternating magnetic field. Background technique [0002] Terahertz waves are electromagnetic waves with frequencies between 0.1THz and 10THz, between millimeter waves and infrared light, and are the transition band from macro electronics to micro photonics. For example, the photon energy of terahertz wave is low (the photon energy of 1THz electromagnetic wave is only about 4meV), which is much smaller than the photon energy of X-ray. Therefore, terahertz wave imaging is a non-destructive imaging method and will not ionize biological cells; At the same time, the vibrational and rotational energy levels of many organic and biological macromolecules fall in the terahertz band; and terahertz waves are very sensitive to the moisture in biological ...
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IPC IPC(8): A61B5/00
Inventor 张亮亮张锐吴同张存林
Owner 北京远大恒通科技发展有限公司
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