@misc{indiciae906ee4957294,
  title = {[Improved endocardium imaging using modified transthoracic echocardiography with the second harmonic frequency (tissue harmonic imaging)].},
  author = {H Becher and K Tiemann},
  year = {1998},
  doi = {10.1007/bf03043753},
  url = {https://pubmed.ncbi.nlm.nih.gov/10023580/},
  note = {Source identifier: 10023580}
}