Abstract: Optimal design method and apparatus for synchronous digital circuits by retiming through selective flipflop positioning and electronic circuit configuration produced by executing the method. The method is for designing a synchronous digital electronic circuit that comprises cells and clocked flipflops interconnected by nets and running at a predetermined clock period, operates as follows. First, uniform-directedly as starting from any cell for any sub-path emanating therefrom its associated delay is accumulated. Next, if for such sub-path the accumulation result exceeds a predetermined integer number of clock periods. The sub-path in question is signalled for subsequent provision with such integer number of flipflops and its accumulation is terminated. Finally, all elementary cell-to-cell connections are provided with flipflops in minimal accordance with said signalling. The invention is particularly advantageous with large circuits such as used in digital video processors and with small clock periods.

Abstract: A computer tomography device is provided with a reconstruction unit (1) for deriving brightness values of an image from density values. An image processing system (2) for deriving corrected brightness values from the brightness values of the image is arranged to calculate the variation of brightness values of the image in the radial direction and in the tangential direction. The image processing system is also arranged to calculate the deviation between the variation in the radial direction and the variation in the tangential direction and to derive corrected brightness values from brightness values of the image and the deviation.

Abstract: A urological examination apparatus, includes a patient table at the foot of which there is provided a sink which serves to collect fluids and which is provided with a drain. The sink is pivotable about a horizontal shaft which extends perpendicularly to the longitudinal direction of the table.