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. Copyright 2003 Blackwell Publishing Asia Pty Ltd
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. Copyright 2003 Blackwell Publishing Asia Pty Ltd
Authors: Christoph F Dietrich; Paolo Giorgio Arcidiacono; Barbara Braden; Sean Burmeister; Silvia Carrara; Xinwu Cui; Milena Di Leo; Yi Dong; Pietro Fusaroli; Uwe Gottschalk; Andrew J Healey; Michael Hocke; Stephan Hollerbach; Julio Iglesias Garcia; André Ignee; Christian Jürgensen; Michel Kahaleh; Masayuki Kitano; Rastislav Kunda; Alberto Larghi; Kathleen Möller; Bertrand Napoleon; Kofi W Oppong; Maria Chiara Petrone; Adrian Saftoiu; Rajesh Puri; Anand V Sahai; Erwin Santo; Malay Sharma; Assaad Soweid; Siyu Sun; Anthony Yuen Bun Teoh; Peter Vilmann; Hans Seifert; Christian Jenssen Journal: Endosc Ultrasound Date: 2019 Nov-Dec Impact factor: 5.628