PROBLEM TO BE SOLVED: To suppress the deviation of the pixel position (centroid position of a pixel group) after addition in the horizontal, vertical, and oblique directions when using the pixel value of each pixel in each pixel group by adding them for each pixel group prepared by combining a plurality of neighboring pixels and to secure resolution in each direction.SOLUTION: For each pixel group prepared by combining a plurality of neighboring pixels of a radiation detector in which a plurality of hexagonal pixels are disposed in a honeycomb pattern, the pixel value of each pixel in each pixel group is added, and interpolation processing is performed on image data the pixel value of which is the total value of each pixel of the pixel group so that the plurality of pixels mean image data representing an image in which a plurality of pixels are disposed in a rectangular grid pattern. The combination of each pixel of a pixel group is determined in such a manner that when a plurality of hexagonal areas, each of which includes one centroid and is formed by connecting six centroids around the centroid, are formed adjacently using the centroid of each area surrounded by the borders of pixel groups, the plurality of hexagonal areas thus formed are disposed in a honeycomb pattern.COPYRIGHT: (C)2013,JPO&INPIT【課題】隣り合う複数の画素を組み合わせた画素群毎に、各画素群内の各画素の画素値を加算して用いる場合に、水向、垂直、及び斜め方向の各方向について加算後の画素位置(画素群の重心位置)の偏りを抑制し、各方向について解像度を確保する。【解決手段】六角形状の複数の画素をハニカム状に配列した放射線検出器の隣り合う複数の画素を組み合わせた画素群毎に、各画素群内の各画素の画素値を加算し、画素群の各画素の画素値の合計値を画素値とする画像データを、複数の画素が正方格子状に配列された画像を表わす画像データとなるように補間処理を行う。画素群の輪郭によって囲まれた各領域の重心を用いて、1つの重心を内部に含みかつ該1つの重心の周囲に存在する6個の重心を線で結んで形成される六角形状の領域を隣接させて複数個形成したときに、該形成した複数個の六角形状の領域がハニカム状に配列されるように、画素群の各画素の組み合わせを定める。【選択図】図7
