title: 7.5-MHz Pediatric Phased Array Transesophageal Endoscope.
abstract: 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. (ECHOCARDIOGRAPHY, Volume 13, November 1996)
authors.affiliation: Pediatric Cardiology UHN60, Oregon Health Sciences University, 3181 SW Sam Jackson Park Rd., Portland, OR 97201-3098.
authors.forename: Joseph E.
authors.initials: JE
authors.lastname: Piel
authors.forename: Robert S.
authors.initials: RS
authors.lastname: Lewandowski
authors.forename: Peter W.
authors.initials: PW
authors.lastname: Lorraine
authors.forename: L. Scott
authors.initials: LS
authors.lastname: Smith
authors.forename: Takahiro
authors.initials: T
authors.lastname: Shiota
authors.forename: David J.
authors.initials: DJ
authors.lastname: Sahn