. ▁Specifically , ▁the ▁reduced ▁dynam ical ▁intensity ▁transfer ▁between ▁be ams ▁that ▁is ▁associated ▁with ▁P ED ▁results ▁in ▁reduced ▁dynam ical ▁contrast ▁in ▁images ▁collected ▁during ▁pre cess ion ▁of ▁the ▁beam . ▁This ▁includes ▁a ▁reduction ▁in ▁thick ness ▁fr ing es , ▁b end ▁cont ours , ▁and ▁stra in ▁fields . ▁While ▁these ▁features ▁can ▁often ▁provide ▁useful ▁information , ▁their ▁supp ression ▁enables ▁a ▁more ▁straightforward ▁interpretation ▁of ▁diff raction ▁contrast ▁and ▁mass ▁contrast ▁in ▁images . ▁ ▁Tom ography ▁ ▁In ▁an ▁extension ▁of ▁the ▁application ▁of ▁P ED ▁to ▁imag ing , ▁electron ▁tom ography ▁can ▁benefit ▁from ▁the ▁reduction ▁of ▁dynamic ▁contrast ▁effects . ▁Tom ography ▁ent ails ▁collect ing ▁a ▁series ▁of ▁images ▁( 2 - D ▁pro jections ) ▁at ▁various ▁t ilt ▁angles ▁and ▁combining ▁them ▁to ▁re construct ▁the ▁three ▁dimensional ▁structure ▁of ▁the ▁spec imen . ▁Because ▁many ▁dynam ical ▁contrast ▁effects ▁are ▁highly ▁sensitive ▁to ▁the ▁orientation ▁of ▁the ▁cry st all ine ▁sample ▁with ▁respect ▁to ▁the ▁incident ▁beam , ▁these ▁effects ▁can ▁con vol ute ▁the ▁reconst ruction ▁process ▁in ▁tom ography . ▁Similarly ▁to ▁single ▁imag ing ▁applications , ▁by ▁reducing ▁dynam ical ▁contrast , ▁interpretation ▁of ▁the ▁ 2 - D ▁pro jections ▁and ▁thus ▁the ▁ 3 - D ▁reconst ruction ▁are ▁more ▁straightforward . ▁ ▁Investig ating ▁composition ▁ ▁Energy - dis pers ive ▁x - ray ▁spect ro sc opy ▁( ED S ) ▁and ▁electron ▁energy ▁loss ▁spect ro sc