Preclinical study of endoscopic ultrasonography with electronic radial scanning echoendoscope

Katsushi Niwa, Yoshiki Hirooka, Akihiro Itoh, Senju Hashimoto, Takanori Hirai, Kinichi Takeda, Hidemi Goto

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Background: To evaluate the imaging possibility of a newly designed electronic radial scanning echoendoscope (ER-ES). Methods: In the in vivo study of swine, we obtained B-mode endoscopic ultrasonography (EUS) images of the gastric and gallbladder (GB) walls and checked the ability to detect Doppler signals using ER-ES and electronic linear array echoendoscope (EL-ES). Furthermore, in the ex vivo study of swine, B-mode EUS images of fixed gastric and GB wall specimens were obtained using ER-ES, EL-ES and mechanical radial scanning echoendoscope (MR-ES). In the study of resected human specimens, we obtained B-mode EUS images of five resected GB specimens (three normal GB, one cholecystitis and one cancerous) using the three types of echoendoscope. Results: In the in vivo study of swine, ER-ES and EL-ES depicted the gastric walls as five-layered, and the GB walls as single-layered structures. The ability to detect Doppler signals was equal between ER-ES and EL-ES. In the ex vivo study of swine, ER-ES, MR-ES and EL-ES equally delineated the gastric walls as five-layered and GB walls as three-layered structures. In the study of resected human specimens, results demonstrated the normal GB walls as three-layered, the cholecystitis as a combination of outer high-echoic and inner low-echoic layers, and the cancer as a protruded tumor. Conclusions: We conclude that ER-ES has faculties for making B-mode images as well as EL-ES and MR-ES. In addition, in the in vivo study, ER-ES can analyze blood flow information as well as EL-ES.

Original languageEnglish
Pages (from-to)828-835
Number of pages8
JournalJournal of Gastroenterology and Hepatology (Australia)
Volume18
Issue number7
DOIs
Publication statusPublished - 01-07-2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Hepatology
  • Gastroenterology

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