Method for image reconstruction, software for image reconstruction, a recording medium therefor, and a radiographic apparatus

Reconstructing method for performing back projection computations to project radiographic data of an object acquired in each scan position back to a reconstruction area, said method comprising the step of:

• causing the back projection computations to be performed, for each unit area formed by dividing said reconstruction area, for projecting said radiographic data acquired in each scan position, or data resulting from filtering of said radiographic data, back to a two-dimensional or three-dimensional reconstruction area virtually set to a region of interest of said object, said radiographic data being acquired by causing a radiation source and a detector arranged opposite each other across said object to scan said object synchronously, or to scan said object synchronously with rotation of said object, said radiation source irradiating said object with electromagnetic waves capable of penetrating said object, said detector detecting electromagnetic waves transmitted through said object.

A radiographic apparatus for generating two-dimensional or three-dimensional reconstruction images of a region of interest by using reconstruction software to perform back projection computations, wherein:

• said reconstruction software comprises the step of causing the back projection computations to be performed, for each unit area formed by dividing said reconstruction area, for projecting said radiographic data acquired in each scan position, or data resulting from filtering of said radiographic data, back to a two-dimensional or three-dimensional reconstruction area virtually set to a region of interest of said object, said radiographic data being acquired by causing a radiation source and a detector arranged opposite each other across said object to scan said object synchronously, or to scan said object synchronously with rotation of said object, said radiation source irradiating said object with electromagnetic waves capable of penetrating said object, said detector detecting electromagnetic waves transmitted through said object.

A storage medium recording section reconstructing software and readable by a computer, wherein:

• said reconstruction software comprises the step of causing the back projection computations to be performed, for each unit area formed by dividing said reconstruction area, for projecting said radiographic data acquired in each scan position, or data resulting from filtering of said radiographic data, back to a two-dimensional or three-dimensional reconstruction area virtually set to a region of interest of said object, said radiographic data being acquired by causing a radiation source and a detector arranged opposite each other across said object to scan said object synchronously, or to scan said object synchronously with rotation of said object, said radiation source irradiating said object with electromagnetic waves capable of penetrating said object, said detector detecting electromagnetic waves transmitted through said object.