Conventional or single energy CT (SECT) utilizes a single polychromatic X-ray beam (ranging from 70 to 140 kVp with a standard of 120 kVp) emitted from a single source and received by a single detector.
Since materials have unique attenuation profiles at different energy levels according to their linear attenuation coefficient, DECT can utilize mathematical algorithms to examine tissues when exposed to both low and high-energy polychromatic X-ray beams.
Measuring moisture content profiles in a board during drying: A polychromatic X-ray
system interfaced with a vacuum/pressure laboratory kiln.
The technique uses a laboratory source of high-energy polychromatic X-ray
in transmission to evaluate stresses in the bulk of the sample.
This single-wavelength beam is generated by using Bragg diffraction to extract a single-energy beam out of the original polychromatic X-ray