Panoramic X-ray imaging apparatus

摘要

The present invention provides a panoramic imaging apparatus capable of obtaining a clear tomographic image even when the rotation speed of a swivel member changes. The clock for driving an FFT CCD device in accordance with the TDI method is set on the basis of the angular speed omega of the arm detected by a tachogenerator and a function value f ( theta ) which responds to the rotation angle theta of the swivel member detected by an angle detector and used to determine a tomographic orbit. The angle detector is provided with a cam having a shape having been set in accordance with the relationship between the rotation angle theta and the film feeding speed at the time of performing X-ray panoramic imaging by using photographic films. The signal of the angular speed omega and the signal of the function value f ( theta ) corresponding to the angle theta are added by an analog multiplier, and subjected to frequency modulation by a V/F converter to create a TDI clock.