Focus tube

(Phys.) a vacuum tube for Rœntgen rays in which the cathode rays are focused upon the anticathode, for intensifying the effect.

See also: Focus

References in periodicals archive ?
VoluMax is an innovative product line that has been designed with a semiconductor flat-panel detector, a micro and dual focus tube X-ray generation, the system is controlled and operated by the ZEISS Software Metrotom OS.