太赫兹(THz)波是频率位于0.1 THz～10 THz的电磁波。因其具有非电离性，以及可与多数生物分子产生共振响应等特性，在生物医学领域有着巨大应用潜力，尤其在肿瘤检测方面。太赫兹成像技术作为生物医学领域一种新的成像技术，吸引国内外多个研究小组对其开展深入研究。本文列举分析了多种太赫兹成像技术在肿瘤检测的应用，其中可分为太赫兹扫描成像、太赫兹层析成像、太赫兹全息成像以及太赫兹近场成像，介绍了这些成像方式的基本原理以及国内外研究现状，最后对太赫兹成像技术在生物领域的未来做出展望。

Terahertz radiation is an electromagnetic wave whose frequency is in the range of 0.1 THz～10 THz. With its many features such as non-ionizing and resonance to many biomolecules, THz wave has great potential applications in biomedical field, especially in tumor detection. Terahertz imaging technology, as a new imaging technology in biomedical field, is studied by many research groups around the world. In this paper, we listed and analyzed many terahertz imaging methods in tumor detection, including terahertz scanning imaging, terahertz tomography, terahertz holography, and terahertz near-field imaging. We introduced the basic principle of these imaging methods and the works done by different groups worldwide. At last, we presented the prospect of terahertz imaging technology applied in biomedical field.