PROBLEM TO BE SOLVED: To provide a method for acquiring positional information for correction, a method for correcting positional deviation, an image processor, a radiation imaging apparatus, and a measurement phantom which superimpose a two-dimensional transmission image on a three-dimensional reconstituted image and outputs them in detail without time and effort.SOLUTION: The measurement phantom having a plurality of markers on a face formed by movement of an imaging system 2 is used to superimpose the two-dimensional transmission image of the measurement phantom on the three-dimensional reconstituted image of the measurement phantom, and to output the images on a superimposing screen 36. Objects of superposition, namely, the images of the measurement phantom are moved on the screen so that the corresponding markers appearing in the superimposed and outputted images are superimposed with one another. Positional deviations, observed when superimposing and outputting the two-dimensional transmission image on the three-dimensional reconstituted image of the subject, are corrected on the screen through the movement by referring to a correction table 32 which stores correspondence between a plurality of pieces of positional information for correcting the measurement phantom and moved positions of the imaging system 2.COPYRIGHT: (C)2010,JPO&INPIT【課題】2次元透過像と3次元再構成画像とを、手間なく、かつ精緻に重畳出力することができる、補正用位置情報取得方法、位置ズレ補正方法、画像処理装置、放射線撮像装置および計測用ファントムを提供することを目的とする。【解決手段】映像系2の移動で形成される面上に複数のマーカを設けた計測用ファントムを用いて、計測用ファントムの2次元透過像と計測用ファントムの3次元再構成画像とを重ね合わせ画面36で重畳出力し、その重畳出力された像にそれぞれ映り込んだ同一のマーカが重畳されるように重畳の対象となる計測用ファントムの両画像を画面上で移動させ、上述の移動により計測用ファントムの複数の補正用位置情報を映像系2の移動位置と対応させた補正テーブル32を参照して、被検体の2次元透過像と被検体の3次元再構成画像とを重畳出力する際の位置ズレを画面上で補正する。【選択図】図2
