【摘要】：近年來(lái)隨著現(xiàn)代醫(yī)學(xué)水平的不斷提升,對(duì)人體內(nèi)部溫度的精確測(cè)量和實(shí)時(shí)監(jiān)控有著越來(lái)越廣泛的應(yīng)用需求。例如對(duì)新生兒大腦溫度的監(jiān)控、通過(guò)測(cè)量人體組織的溫度來(lái)診斷腫瘤等。傳統(tǒng)的接觸式測(cè)溫法往往需要通過(guò)手術(shù)植入感溫元件,不僅改變了目標(biāo)組織原有的溫度分布,而且具有一定的破壞性。而在非接觸式測(cè)量方法中,采用微波輻射測(cè)量技術(shù)可以無(wú)損傷、實(shí)時(shí)地獲取人體內(nèi)部組織的溫度,因此,微波無(wú)損測(cè)溫在人體醫(yī)學(xué)測(cè)溫領(lǐng)域有著廣闊的發(fā)展前景和研究意義。在此研究背景下,本文對(duì)微波輻射測(cè)量人體內(nèi)部溫度的反演方法進(jìn)行了研究。本文首先對(duì)微波無(wú)損測(cè)量人體內(nèi)部溫度的原理進(jìn)行了敘述,然后在對(duì)已有人體組織微波輻射傳輸模型研究的基礎(chǔ)上,建立了人體組織的五層微波輻射傳輸模型,并分別利用相干法和非相干法對(duì)構(gòu)建的模型進(jìn)行了仿真,最后將兩者的結(jié)果進(jìn)行了對(duì)比分析,驗(yàn)證了微波輻射傳輸模型的正確性。與已有模型相比,該輻射傳輸模型考慮了層間的多次反射,并能計(jì)算不同發(fā)射角情況下的亮溫。接著,本文在調(diào)研各種人體溫度反演方法的基礎(chǔ)上,選取了多角度法對(duì)人體內(nèi)部溫度反演進(jìn)行了仿真,仿真得到的人體內(nèi)部溫度分布與理論值較為吻合,驗(yàn)證了反演算法的正確性。最后,本文采用C波段輻射計(jì)測(cè)量了溫度隨深度呈線(xiàn)性分布水的微波輻射亮溫,并利用多角度法從水的亮溫反演出不同深度的水溫,驗(yàn)證了利用微波輻射計(jì)無(wú)損測(cè)量溫度的有效性。
[Abstract]:In recent years, with the continuous improvement of modern medical level, the precise measurement and real-time monitoring of the internal temperature of human body are more and more widely used. For example, neonatal brain temperature monitoring, by measuring the temperature of human tissue to diagnose tumors, and so on. The traditional contact temperature measurement method often needs to be implanted by surgery, which not only changes the original temperature distribution of the target tissue, but also has a certain degree of destruction. In the non-contact measurement method, microwave radiation measurement technology can be used to obtain the temperature of human tissue in real-time without damage. Therefore, microwave nondestructive temperature measurement has a broad development prospect and research significance in the field of human medicine temperature measurement. In this paper, the inversion method of microwave radiation to measure the internal temperature of human body is studied in this paper. In this paper, the principle of microwave nondestructive measurement of the internal temperature of human body is described, and then on the basis of studying the existing microwave radiation transfer model of human tissue, a five-layer microwave radiation transfer model of human tissue is established. The model is simulated by using the coherence method and the non-coherent method respectively. Finally, the results of the two models are compared and analyzed, and the correctness of the microwave radiation transfer model is verified. Compared with the existing models, the radiative transfer model takes into account the multi-reflection between layers and can calculate the brightness temperature at different emission angles. Then, on the basis of investigating all kinds of human body temperature inversion methods, the multi-angle method is selected to simulate the human body internal temperature inversion, and the simulated internal temperature distribution is in good agreement with the theoretical value. The correctness of the inversion algorithm is verified. Finally, the microwave radiation brightness temperature of water with linear distribution with depth is measured by using C-band radiometer, and the water temperature of different depths is calculated from the brightness temperature of water by multi-angle method. The validity of nondestructive measurement of temperature by microwave radiometer is verified.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：R443.5

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