Method of reconstructing image and apparatus and tomography apparatus for performing the same

An apparatus for reconstructing a tomography image of an object from a plurality of projection images generated by scanning the object in a plurality of projection directions, the apparatus comprising:

• a determinator that determines whether a truncated portion of the object is present in each of the plurality of projection images;
• a first reconstructor that reconstructs a first reconstruction image by using at least one projection image, in which a truncated portion of the object is absent, based on a result of the determining;
• a calculator that calculates projection data for the first reconstruction image, by using the first reconstruction image;
• and
• a second reconstructor that reconstructs a tomography image of the object by using the calculated projection data.

A tomography apparatus comprising:

• a radiation source that emits radiation toward an object in a plurality of projection directions;
• a detector that detects a signal which is generated as the radiation emitted from the radiation source passes through the object and generates a plurality of projection images corresponding to the plurality of projection directions;
• and
• an image reconstruction apparatus that reconstructs a first reconstruction image by using at least one projection image, in which a truncated portion of the object is absent, calculates projection data for the first reconstruction image, and reconstructs a tomography image of the object by using the calculated projection data.