Invited Review Article

Journal of Infrared, Millimeter, and Terahertz Waves

, Volume 35, Issue 4, pp 382-411

Review of Terahertz Tomography Techniques

  • J. P. GuilletAffiliated withUniversité de Bordeaux, LOMA, UMR CNRS 5798
  • , B. RecurAffiliated withUniversité de Bordeaux, LOMA, UMR CNRS 5798
  • , L. FrederiqueAffiliated withUniversité de Bordeaux, LaBRI, UMR CNRS 5800
  • , B. BousquetAffiliated withUniversité de Bordeaux, LOMA, UMR CNRS 5798
  • , L. CanioniAffiliated withUniversité de Bordeaux, LOMA, UMR CNRS 5798
  • , I Manek-HönningerAffiliated withUniversité de Bordeaux, LOMA, UMR CNRS 5798
  • , P. DesbaratsAffiliated withUniversité de Bordeaux, LaBRI, UMR CNRS 5800
  • , P. MounaixAffiliated withUniversité de Bordeaux, LOMA, UMR CNRS 5798 Email author 

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Abstract

Terahertz and millimeter waves penetrate various dielectric materials, including plastics, ceramics, crystals, and concrete, allowing terahertz transmission and reflection images to be considered as a new imaging tool complementary to X-Ray or Infrared. Terahertz imaging is a well-established technique in various laboratory and industrial applications. However, these images are often two-dimensional. Three-dimensional, transmission-mode imaging is limited to thin samples, due to the absorption of the sample accumulated in the propagation direction. A tomographic imaging procedure can be used to acquire and to render three-dimensional images in the terahertz frequency range, as in the optical, infrared or X-ray regions of the electromagnetic spectrum. In this paper, after a brief introduction to two dimensional millimeter waves and terahertz imaging we establish the principles of tomography for Terahertz Computed tomography (CT), tomosynthesis (TS), synthetic aperture radar (SAR) and time-of-flight (TOF) terahertz tomography. For each technique, we present advantages, drawbacks and limitations for imaging the internal structure of an object.

Keywords

Tomography Terahertz imaging 3D reconstruction Time of flight Holography Diffractive imaging Synthetic aperture radar (SAR) THz Computed tomography Iterative method BFP Volume inspection Non destructive testing Sinogram Millimeter waves Far infrared Spectro imaging Reflection and transmission images