About: http://webisa.webdatacommons.org/225058750

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	This necessity is based upon the fact that the treatment radiation beam passes through different thicknesses of tissue as it rotates around the head, or other portion of the patient's body.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com