About: http://webisa.webdatacommons.org/9064081

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	By subtraction between these synchronous images, contrasts due to tissues not impregnated by the contrast material, in other words tissues with lesser interest and particularly tissues other than heart tissues, are eliminated.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk