Patent ID: 7949087
Filing Date: 2011-05-24
Classification: G03B,Y10T

Abstract:
1. A radiography apparatus comprising: a scanning table section comprising a cradle on which a subject is laid; a scanning section configured to perform a scan by emitting radiation toward a region of the subject to be imaged and detect radiation passing through the region to be imaged to acquire projection data; and a data processing section configured to reconstruct an image of the region based on the projection data acquired by said scanning section, said scanning table section configured to move the cradle in a forward direction and in a backward direction relative to said scanning section, said scanning section configured to perform a scan as the cradle is being moved in said forward direction to acquire a first set of projection data, and perform a scan as the cradle is being moved in said backward direction to acquire a second set of projection data, and wherein said data processing section is configured to reconstruct a forward-path image based on said first set of projection data, and reconstruct a backward-path image based on said second set of projection data, wherein said data processing section comprises: a positional offset determining section configured to determine a positional offset that represents a distance in a direction along said forward direction and said backward direction between a first subject position and a second subject position, said first subject position being a position at which the region to be imaged is scanned when the cradle is moved in said forward direction, and said second subject position being a position at which the region to be imaged is scanned when the cradle is moved in said backward direction, the positional offset determining section further configured to correct at least one of said forward-path image and said backward-path image based on the determined positional offset such that respective pixel positions in said forward-path image and said backward-path image lie at positions corresponding to each other in the direction along said forward direction and said backward direction.