Radiation image forming method and apparatus

A radiation image forming apparatus comprising image signal forming means for obtaining at least either one of a volume signal and a tomographic image signal representing an image of an object from a plurality of radiation image signals, which represent radiation images of the object and which have been obtained by irradiating radiation from different directions to the object and detecting the radiation carrying image information of the object via scattered radiation removing means for removing radiation having been scattered by the object,

• wherein the apparatus further comprises pattern reducing means for reducing image signal components representing a pattern of the scattered radiation removing means, which are contained in the radiation image signals, pattern-reduced radiation image signals, in which the image signal components representing the pattern of the scattered radiation removing means have been reduced, being thereby obtained, and
• the image signal forming means obtains at least either one of the volume signal and the tomographic image signal from said pattern-reduced radiation image signals, which have been obtained from said pattern reducing means.