Patent ID: 7412022

Claim:
A three-dimensional image-generating device comprising: an external gamma radiation source configured to irradiate an inspected object with source gamma rays to generate a three-dimensional representation of said inspected object; a modulating unit employing time-dependent nodal windows, each of said nodal windows configured to impose a different time modulation to encode gamma flux from said external gamma radiation source or Compton-scattered gamma rays from within the inspected object as at least one of said source gamma rays and said Compton-scattered gamma rays interact within said inspected object; said modulating unit configured to identify scattering locations, by either modulating said source gamma rays or said Compton-scattered gamma rays as either said source gamma rays or said Compton-scattered gamma rays pass through said nodal windows of said modulating unit; and a radiation detector configured to detect said Compton-scattered gamma rays scattered from within said inspected object.