#ndt Terahertz imaging could be a prime candidate for non-destructive testing. THz rays are non-ionizing and low-energy (from 0.3 THz to 10 THz), and have the capacity to penetrate a number of non-conductive and non-polar materials like skin, certain plastics, certain garments, paper, and cardboard. THz rays pose less of a danger than X-ray imaging systems and offer greater spatial resolutions than microwave or millimeter-wave scanners.

A microbolometer-based IR imaging technology developed by Leti, a CEA Tec
Source: NDT