Thursday, 10 May 2012

Advancing in-vivo terahertz imaging


Emma Pickwell-MacPherson


New developments in terahertz frequency imaging make it suited to assist in patient screening and diagnosis.
7 February 2011, SPIE Newsroom. DOI: 10.1117/2.1201012.003437
Terahertz (1012Hz, THz) frequency radiation lies between the IR and millimeter regions of the electromagnetic spectrum (1THz corresponds to 33.3cm−1, 4.14meV, and has a wavelength of 300μm). Historically, terahertz wave generation was a challenge. Various methods to extend optical techniques to lower frequencies or to ramp up electronic techniques to higher frequencies have been explored. Significant advances in the field mean that presently, numerous companies sell systems and components worldwide (see Figure 1). As generating terahertz radiation is no longer a hurdle, the interest now lies in finding potential applications for this radiation.



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