Active THz medical imaging using broadband direct detection

Zachary D. Taylor; James Garritano; Priyamvada Tewari; Eric Diebold; Shijun Sung; Neha Bajwa; Bryan Nowroozi; Alexander Stojadinovic; Nuria Llombart; Elliott R. Brown; Warren S. Grundfest

doi:10.1117/12.2012070

27 March 2013 Active THz medical imaging using broadband direct detection

Zachary D. Taylor, James Garritano, Priyamvada Tewari, Eric Diebold, Shijun Sung, Neha Bajwa, Bryan Nowroozi, Alexander Stojadinovic, Nuria Llombart, Elliott R. Brown, Warren S. Grundfest

Author Affiliations +

Proceedings Volume 8624, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VI; 862403 (2013) https://doi.org/10.1117/12.2012070
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

Research in THz imaging is generally focused on three primary application areas: medical, security, and nondestructive evaluation (NDE). While work in THz security imaging and personnel screening is populated by a number of different active and passive system architectures, research in medical imaging in is generally performed with THz time-domain systems. These systems typically employ photoconductive or electro-optic source/detector pairs and can acquire depth resolved data or spectrally resolved pixels by synchronously sampling the electric field of the transmitted/reflected waveform. While time-domain is a very powerful scientific technique, results reported in the literature suggest that desired THz contrast in medical imaging may not require the volume of data accessible from time-resolved measurements and that a simpler direct detection, active technique may be sufficient for specific applications. In this talk we discuss an active direct detection reflectometer system architecture operating at a center frequency of ~ 525 GHz that uses a photoconductive source and schottky diode detector. This design takes advantage or radar-like pulse rectification and novel reflective optical design to achieve high target imaging contrast with significant potential for high speed acquisition time. Results in spatially resolved hydration mapping of burn wounds are presented and future outlooks discussed.

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Zachary D. Taylor, James Garritano, Priyamvada Tewari, Eric Diebold, Shijun Sung, Neha Bajwa, Bryan Nowroozi, Alexander Stojadinovic, Nuria Llombart, Elliott R. Brown, and Warren S. Grundfest "Active THz medical imaging using broadband direct detection", Proc. SPIE 8624, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VI, 862403 (27 March 2013); https://doi.org/10.1117/12.2012070

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