TY  - RPRT
TI  - Backscatter coefficient measurements using a reference phantom to extract depth-dependent instrumentation factors.
AU  - L X Yao
AU  - J A Zagzebski
AU  - E L Madsen
PY  - 1990
DO  - 10.1177/016173469001200105
UR  - https://pubmed.ncbi.nlm.nih.gov/2184569/
ID  - 2184569
ER  -