A method for detection of ionizing radiation comprises the steps of (i)directing ionizing radiation towards an object (7) to be examined； (ii)preventing Compton scattered radiation (3a, 3c), preferably at least 99% ofthe radiation Compton scattered in said object, from being detected； and (iii)detecting ionizing radiation spatially resolved as transmitted through saidobject to reveal a spatially resolved density of said object, wherein saidionizing radiation is provided within a spectral range such that more,preferably much more, photons of said ionizing radiation are Compton scatteredthan absorbed through the photoelectric effect in said object to therebyreduce the radiation dose to said object.
