RADIOGRAPHIC METHOD AND X-RAY DEVICE HAVING DISPERSION PREVENTIVE GRID

摘要

PURPOSE: A radiographic x-ray device is to move a dispersion preventive grid in a simple mechanical manner to improve the quality of image and remove the visual trace of the grid plate. CONSTITUTION: A radiographic device moves the dispersion preventive grid under the condition that the time coordinates is equal to 1/2 of exposure time(TP) and the derived function of space from time variation makes a continuous curve(CB) being in point symmetry to a point(SP) and including two linear regions in symmetry relative to the axis of symmetry passing the middle of the grid movement range. The grid is to move at high speed(VO) at the starting point(XO) and the final point(XM).