About: http://webisa.webdatacommons.org/428651092

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	However, since conventional x-ray imaging is based on the absorption properties of materials, it is difficult for current CT systems to distinguish low-density materials, such as soft tissues.
http://www.w3.org/ns/prov#wasQuotedFrom	opticsinfobase.org