TY - RPRT TI - A quantitative approach to speckle reduction via frequency compounding. AU - G E Trahey AU - J W Allison AU - S W Smith AU - O T von Ramm PY - 1986 DO - 10.1177/016173468600800301 UR - https://pubmed.ncbi.nlm.nih.gov/3548000/ ID - 3548000 ER -