About: http://webisa.webdatacommons.org/188712247

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, beam hardening from materials other than water and bone, such as metals and contrast agents, may be difficult to correct without added processing of the measured data.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr