A radiological image diagnostic system is provided with a radiation generating unit, a radiation detecting unit, a clipping-correction unit and an image reconfiguration unit. The radiation generating unit generates a radiation. The radiation detecting unit detects the radiation from the radiation generating unit. The clipping-correction unit applies a clipping process to a radiation detected value by the radiation detecting unit and applies a mean value correction process to data acquired based upon the radiation detected value so that the separation of the local mean of the data acquired based upon the radiation detected value before and after the clipping process is reduced. The image reconfiguration unit generates an image using data acquired based upon a radiation detected value after the clipping process and after the mean value correction process.