An apparatus for reconstructing an image from the derivative of a sinogram includes means for multiplying a projection orientation unit vector field with the derivative to form an oriented derivative, means for back-projecting the oriented derivative, and means for Riesz transforming the back-projected oriented derivative. The assigned graphic objects can be subsequently loaded by the user by activating an \u201cassigned to\u201d object. A trench is also provided, which extends through the semiconductor layer and into the base region. An internet browser associated with the customer is caused to display the authorization form. , higher, than a display pixel rate.