1. A volume image reconstruction apparatus, comprising: a data collection unit configured to receive circle projection data collected by a detector along a circular path with respect to an object, produce pre-processed circle projection data from the received circle projection data, receive line projection data collected by the detector along a linear path with respect to the object, and produce pre-processed line projection data from the received line projection data; a circle projection data reconstruction unit configured to produce a reconstructed circle path volume image of the object from the pre-processed circle projection data using a reconstruction algorithm that includes a ramp filter; a line projection data reconstruction unit configured to produce a reconstructed line path volume image of the object from the pre-processed line projection data using a reconstruction algorithm that includes a Hilbert filter; and an image volume processing unit configured to combine the reconstructed circle path volume image and the reconstructed line path volume image to produce the volume image of the object.