TY  - RPRT
TI  - [Improved endocardium imaging using modified transthoracic echocardiography with the second harmonic frequency (tissue harmonic imaging)].
AU  - H Becher
AU  - K Tiemann
PY  - 1998
DO  - 10.1007/bf03043753
UR  - https://pubmed.ncbi.nlm.nih.gov/10023580/
ID  - 10023580
ER  -