Clinical experience with a new endoscopic ultrasound probe combining radial and linear scanning facilities in the esophagus and stomach.

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We applied the new endoscopic ultrasound probe combining radial and linear scanningfacilities (FUJINON, SONOPROBE SYSTEM SP-501) for endoscopic ultrasonography (EUS) of various lesions of the esophagus and stomach, during the 11-month period fromFebruary through December 1993. The subjects of this study comprised ten lesions ofesophageal cancer, two esophageal dysplasia, three esophageal leiomyoma, one benignesophageal stenosis and five early gastric cancer. <BR> A20-MHz ultrasoud transducer combining radial and linear scanning is mounted onthe tip of the probe. A translator is attached to the opening of biopsy channel of ordinaryendviewing endascape, and the mode of radial and linear scanning is able to easily changedusing lever on it. Under direct control of endoscopy, we scanned lesions with real time radial method totake tomographic overview and confirm the area of interest of it, and we then addedmanual linear scan to take mare detailed infarmatian of the area. Some of subjects were small (less than 1 cm in diameter), although there was no undetectable lesion. In this study, the results of tumor invasion depth diagnosis was not improved comparedwith those of current reports. However, these two scanning modes combining a probe haveovercome a weak point of conventional EU5 instruments which were hard to visualizesuperficial or small lesions.
社団法人日本消化器内視鏡学会の論文