Abstract: Scanning slit radiography apparatus with a radiographic grid of the invention makes possible the X-ray imaging at an enhanced primary radiation transmission, yet at a reduced scatter transmission. By orienting long axes A of radiopaque strips 12 obliquely to the sweep S of the grid 1, the strips 12 being separated by air interspaces 13 can be performed with a sufficient own stiffness that no aluminum top and bottom covers are needed. The planes of downward lateral faces 12' intersect each other in an upward decentration line D.sub.+ and the planes of upward lateral faces 12" intersect each other in a downward decentration line D.sub.-. In a preferred embodiment of the invention the grid 1 is inclined during the sweep S so that the convergent line of the grid continues to pass through the tube focus.