Tomography apparatus e.g. ultrasonic tomography apparatus, has arm shaft counterbalance attached to measuring device so that it moves to axial direction only at radial direction in two mutually separated parallel flat surfaces

摘要

The arm shaft counterbalance (15a) is attached to the ring shaped measuring device (3) such that it adjusts arm shaft counterbalance position only to radial direction in two parallel flat surfaces mutually separated by the axial direction.