Assertion: radiation's effect | /r/CapableOf | offer excellent contrast
Facets:
value: with effective atomic number
type: OTHER
value: with compton
type: OTHER
value: comparatively
type: MANNER
Source sentences:
text: Medically useful X-rays are produced when electrons are accelerated to energies at which either the photoelectric effect predominates (for diagnostic use, since the photoelectric effect offers comparatively excellent contrast with effective atomic number Z) or Compton scatter and pair production predominate (at energies above approximately 200 keV for the former and 1 MeV for the latter), for therapeutic X-ray beams.