Patent ID: 8406376
Filing Date: 2013-03-26
Classification: A61B,G06T

Abstract:
1. A radiographic apparatus for obtaining a radiological image, comprising: a scattered radiation removing device for removing scattered radiation; and a radiation detecting device having a plurality of detecting elements arranged in rows and columns for detecting radiation; the scattered radiation removing device being constructed to have absorbing layers for absorbing the scattered radiation, which layers are arranged in a direction parallel to at least one of directions of rows and columns of the detecting elements, such that spacing between adjacent shadows among shadows of the absorbing layers formed on the radiation detecting device as a result of the absorbing layers absorbing the radiation is larger than spacing between pixels forming the radiological image; the apparatus further comprising: a first image data acquiring device for acquiring image data in presence of a subject to be imaged and the scattered radiation removing device; an image data smoothing device for smoothing the image data acquired by the first image data acquiring device, along a direction of extension of the absorption layers; a grid data acquiring device for acquiring grid data in absence of the subject and in presence of the scattered radiation removing device; a shadowless pixel calculating device for obtaining pixels without shadows based on the shadows in the grid data acquired by the grid data acquiring device; a shadow total quantity calculating device for calculating a total quantity of shadows per absorbing layer based on positions of the pixels without shadows obtained by the shadowless pixel calculating device; an image data correcting device for correcting the image data smoothed by the image data smoothing device, based on the total quantity of shadows per absorbing layer calculated by the shadow total quantity calculating device; and a second image data acquiring device for determining data after shadow removal based on the image data corrected by the image data correcting device and the image data acquired by the first image data acquiring device, and acquiring the data after shadow removal as final image data.