Method and apparatus for radiography

A Method of panoramic radiography, said method utilizing an X-ray source (13) whose beam (X) is focused onto the object (M) to be radiographed, whereby said beam (X) is used for imaging an X-ray picture of the radiographed object (M) onto an imaging means, and in which method a grid assembly (20) adapted between the radiographed object (M) and the imaging means is used, said grid assembly serving the purpose of canceling the disturbing effect caused by backscattered or secondary radiation generated in the radiographed object (M) from the radiographed image, and further, said grid assembly (20) comprising a grid plate (22) having several parallel, essentially equidistantly spaced, X-ray opaque lamellas, whereby X-ray radiation can pass through the spaces (24) between said lamellas in the direction of the X-ray beam to act on the imaging means, and in which method the grid plate (22) is set in an oscillating motion in the plane of the grid plate (22) in a direction (T) perpendicular to the longitudinal direction of the grid lamellas, characterized in that the grid plate is set in a reciprocatingly oscillating motion in a controlled manner in regular cycles (T) of travel with a varying amplitude so that the stops or changes of direction (K.sub.1. . . K.sub.5) in the oscillating a motion are distributed essentially evenly over the interlamellar spaces of the grid plate (22) so as to prevent the grid lamellas (23) form becoming imaged onto the imaging means in a disturbing manner.