1. A method for computerized processing of an x-ray image, comprising the steps of: supplying electronic data to a computerized processor representing an x-ray image that contains blurring caused by a projection direction-dependent, effective optical focal size of an optical focus of an x-ray tube used to acquire the x-ray image; making a projection direction-dependent focus profile of said effective optical focus of said x-ray tube available to said computerized processor; and in said computerized processor, automatically implementing a mathematical correction of said x-ray image using said profile to at least partially remove said blurring in said x-ray image in order to produce a corrected image, and making said corrected image available at an output of the processor in electronic form as a data file.