Assertion: ion's proton | /r/HasAspect | little lateral side
Facets:
value: because of their relatively large
type: CAUSE
value: in the tissue
type: LOCATION
Source sentences:
text: Because of their relatively large mass, protons have little lateral side scatter in the tissue; the beam does not broaden much, stays focused on the tumor shape, and delivers only low-dose side effects to surrounding tissue.