Forward viewing and radial scanning ultrasonic endoscope

摘要

In a radial scan, forward viewing ultrasonic endoscope, centering mating portions (46, 32) that permit the outer surface (45) of ultrasonic probe (4) and the outer surface (31) of tip body (3) to meet flush with each other at the boundary are formed in ultrasonic probe (4) and in tip body (3) and the gap between the inner peripheral surface (41a) of ultrasonic probe (4) and mating surface of the front half (33) of tip body (3) is formed to be larger than the gap between centering mating portions (46, 32).