7.5-MHz pediatric phased array transesophageal endoscope

Joseph E. Piel, Robert S. Lewandowksi, Peter W. Lorraine, L. Scott Smith, Takahiro Shiota, David J. Sahn

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


This work extends the clinical benefits of phased array transesophageal echocardiography with high detail and contrast resolution to include neonatal patients. We have built several prototype, 64-element, 7.5-MHz phased array transducers housed in 6.2-mm endoscope shafts for use with commercially available imaging systems. The acoustic design is standard, but the miniaturized packaging of the electrical connections was quite challenging. The endoscopes demonstrate very good structural resolution and excellent sensitivity for color flow imaging and continuous-wave Doppler. They have been used on patients as small as 1.9 kg, frequently as an anatomical guide during catheter-based interventions and during congenital heart surgery. Array test data and representative clinical studies are shown.

Original languageEnglish (US)
Pages (from-to)677-683
Number of pages7
Issue number6
StatePublished - 1996
Externally publishedYes


  • pediatric phased array transesophageal echocardiography
  • pediatric transesophageal echocardiography

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine


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