Terahertz radiation

Optics

Physics

Cancer

Internal medicine

Electromagnetic spectrum

Imaging spectroscopy

Materials science

Cancer detection

Spectroscopy

Optoelectronics

Quantum mechanics

Medicine

Terahertz spectroscopy and technology

BME Frontiers

Terahertz (THz) waves are electromagnetic waves with frequency in the range from 0.1 to 10 THz. THz waves have great potential in the biomedical field, especially in cancer diagnosis, because they exhibit low ionization energy and can be used to discern most biomolecules based on their spectral fingerprints. In this paper, we review the recent progress in two applications of THz waves in cancer diagnosis: imaging and spectroscopy. THz imaging is expected to help researchers and doctors attain a direct intuitive understanding of a cancerous area. THz spectroscopy is an efficient tool for component analysis of tissue samples to identify cancer biomarkers. Additionally, the advantages and disadvantages of the developed technologies for cancer diagnosis are discussed. Furthermore, auxiliary techniques that have been used to enhance the spectral signal-to-noise ratio (SNR) are also reviewed.

Terahertz Imaging and Spectroscopy in Cancer Diagnostics: A Technical Review