A method for the non-destructive inspection of a rotationally symmetric workpiece having sections with different diameters by means of a non-destructive inspection technique, such as ultrasound, comprising the following method steps: a) generating by means of the inspection technique a test data set characterizing the material properties of the workpiece, with the elements of the test data set being respectively assigned to a defined test volume (Vi) in the workpiece, wherein the test data are obtained by insonifying ultrasonic test pulses into the workpiece at different coupling locations (Ei) at different defined insonification angles (Theta i ) and subsequent recording of the ultrasonic echo signals resulting from one insonified ultrasonic test pulse, respectively, from the workpiece at the coupling location (Ei) at the insonification angle (Theta), the test volume (Vi) being a region of interest defined by a selected travel time interval, the travel time interval (Ii; i=1,...,N) being selected dependent on the associated sound path (Wi; i=1,...,N) in the workpiece , the selected travel time interval (Ii) corresponding to a near-surface region of interest (ROI) of the workpiece , the test volume position in the workpiece being defined by an azimuth angle of rotation about the axis of symmetry (S) of the workpiece (Beta i ), a radial distance (Ri) from the axis of symmetry (S) of the workpiece , and an (X) position (Xi) along the axis of symmetry (S) of the workpiece , the test data set including a partial set (T) of several elements assigned to a plurality of test volumes (Vi) having a common (X) position (Xi) and a common radial distance (Ri) but different azimuth angles (Beta), b) forming an azimuth angle-dependent indicated value set (Ai), wherein this forming includes differentiation of the partial set (T) with respect to the azimuth angle (Beta), and c) generating a representation of the workpiece , wherein the elements of the indicated value set (Ai) are depicted in the representation in a spatially resolved manner. a) generating by means of the inspection technique a test data set characterizing the material properties of the workpiece, with the elements of the test data set being respectively assigned to a defined test volume (Vi) in the workpiece, wherein the test data are obtained by insonifying ultrasonic test pulses into the workpiece at different coupling locations (Ei) at different defined insonification angles (Theta i ) and subsequent recording of the ultrasonic echo signals resulting from one insonified ultrasonic test pulse, respectively, from the workpiece at the coupling location (Ei) at the insonification angle (Theta), the test volume (Vi) being a region of interest defined by a selected travel time interval, the travel time interval (Ii; i=1,...,N) being selected dependent on the associated sound path (Wi; i=1,...,N) in the workpiece , the selected travel time interval (Ii) corresponding to a near-surface region of interest (ROI) of the workpiece , the test volume position in the workpiece being defined by an azimuth angle of rotation about the axis of symmetry (S) of the workpiece (Beta i ), a radial distance (Ri) from the axis of symmetry (S) of the workpiece , and an (X) position (Xi) along the axis of symmetry (S) of the workpiece , the test data set including a partial set (T) of several elements assigned to a plurality of test volumes (Vi) having a common (X) position (Xi) and a common radial distance (Ri) but different azimuth angles (Beta), b) forming an azimuth angle-dependent indicated value set (Ai), wherein this forming includes differentiation of the partial set (T) with respect to the azimuth angle (Beta), and c) generating a representation of the workpiece , wherein the elements of the indicated value set (Ai) are depicted in the representation in a spatially resolved manner. <EOS>