Fukuda M, Nakano Y, Saito K, Hirata K, Terada S, Urushizaki I
Scand J Gastroenterol Suppl. 1984;94:65-76.
To overcome limitation of ultrasound diagnosis of pancreatic diseases, especially of malignancy, the use of an echoendoscope was investigated. The instruments were the prototype echoendoscopes type 1-3 manufactured by Olympus Co., Tokyo, Japan. The first prototype was a mirror-type radial sector scanner equipped to a gastrofiberscope . The 2nd and 3rd types were of similar construction except the use of a small transducer with an increased frequency (7 mm in diameter, 7.5 MHz) and of direct rotation of the transducer connected to the flexible shaft. To visualize the pancreas effectively, a liquid-filled stomach method to use deaerated water in sufficient quantity was employed. As a result, complete visualization of the whole pancreas could be accomplished mainly from the gastric lumen via the gastric wall. Though the number of cases examined were still limited, ultrasonic differential diagnosis between benign and malignant lesions could be made much more clearly than those by currently used ultrasonic scanning.
为克服超声诊断胰腺疾病尤其是恶性肿瘤的局限性，对超声内镜的应用进行了研究。所用仪器为日本东京奥林巴斯公司制造的1 - 3型超声内镜原型机。第一台原型机是安装在纤维胃镜上的镜面型径向扇形扫描仪。第2型和第3型结构相似，只是使用了频率更高的小型换能器（直径7mm，7.5MHz），且换能器与挠性轴直接相连并可直接旋转。为有效显示胰腺，采用了充液胃法，即使用足量的脱气水。结果，主要通过胃腔经胃壁可实现整个胰腺的完整显像。尽管检查的病例数仍然有限，但与目前使用的超声扫描相比，良性和恶性病变之间的超声鉴别诊断能更清晰地进行。
