A radiographic image forming apparatus having a radiation source for irradiating
conical radiation to a test body; a stimulable phosphor plate, arranged opposite
to the radiation source with the test body sandwiched in-between for recording
an intensity of radiation having passed through the test body; a rotation/displacement
section for relatively rotating and displacing the radiation source with respect
to the test body, by placing the test body at a rotation center; a radiation controller
for controlling a radiation from the radiation source; a recording section for
recording at least one sinogram into the stimulable phosphor plate by the radiation;
a reading section for reading a sinogram recorded by the recording section; and
an image processing section for forming a two-dimensional or three-dimensional
tomographic image by reconstructing a sinogram read by the reading section.