CAJ | 학술논문

太赫兹已经被用于对三维物体进行计算机辅助层析成像，但具有很高的折射损耗。设计了基于耿氏二极管和返波振荡器的连续波断层成像实验装置，对聚四氟乙烯模型进行扫描获得投影数据，然后利用滤波反投影算法对投影数据进行重建得到断面图像，用于研究折射对投影及图像的影响。最后对人体牙齿样本进行扫描和重建，探讨THz-CT在医学成像特别是牙齿等骨骼成像中应用的可行性和前景。
태혁자이경피용우대삼유물체진행계산궤보조층석성상，단구유흔고적절사손모。설계료기우경씨이겁관화반파진탕기적련속파단층성상실험장치，대취사불을희모형진행소묘획득투영수거，연후이용려파반투영산법대투영수거진행중건득도단면도상，용우연구절사대투영급도상적영향。최후대인체아치양본진행소묘화중건，탐토THz-CT재의학성상특별시아치등골격성상중응용적가행성화전경。
Terahertz has been used to perform computer aided tomography of 3D objects,but it has high refraction losses. Experimental system of CW-CT based on Gunn diode and BWO is constructed to scan teflon samples and obtain projection dataset.Then cross sectional images of the samples are reconstructed from the dataset by FBP algorithm to research refrac-tion effects.Finally,human tooth samples are scanned and reconstructed,and the feasibility and prospect of THz-CT in medical imaging applications especially imaging of human bones such as tooth are discussed.