【题 名】：Real-Time Elastography: Strain Ratio Measurements Are Influenced by the Position of the Reference Area.
【作 者】：Havre RF, Waage JR, Gilja OH, Odegaard S, Nesje LB.
【年, 卷(期), 起止页码】：Ultraschall Med. 2011 Jun 10.
【全文链接】：http://www.ncbi.nlm.nih.gov/pubmed/21667433