Abstract: An apparatus for generating acoustic waves has an acoustic transducer with a first electrode serving as a membrane and adjoining an acoustic propagation medium and a second electrode spaced from the first, between which an electrolyte is situated. The acoustic transducer is fashioned transparent to X-rays.

Abstract: A communication system having at least two communication subscribers unidirectionally or bidirectionally exchanging data that are electrically connected to one another via at least one network cable which is in turn, connectible to a network termination via which energy can be supplied to the communication subscribers and via which an at least two-channel transmission of data in the form of electrical signals can occur at the same time from a first to a second communication subscriber.

Abstract: An apparatus for generating acoustic waves has an acoustic transducer with a first electrode serving as a membrane and adjoining an acoustic propagation medium and a second electrode spaced from the first, between which an electrolyte is situated. The acoustic transducer is fashioned transparent to X-rays.

Abstract: An diagnostic imaging apparatus for acquiring image information representing at least one region of an examination subject, generates image signals that correspond to the acquired image information and has a signal processor to which the image signals are fed. The signal processor subjects the image signals to spatial-frequency filtering with a controlled bandpass characteristic, in order to be able to display subjects situated in the passband of the bandpass characteristic more clearly with respect to their dimensions.

Abstract: A medical apparatus has an x-ray diagnostics installation which includes an x-ray source and a radiation reception arrangement having a radiation receiver that is mounted opposite the x-ray source and that can be rotated around an axis on a circular path synchronously with the x-ray source for imaging a discrete area lying on the axis. The x-ray source is activated during the rotating and the radiation reception arrangement integrates signals corresponding to the received radiation.

Abstract: An apparatus for disintegrating calculi situated in the body of a life form having a cable with a shielded middle conductor connecting a pulse generator and a shock wave generator. The connecting cable is a triaxial cable that has a middle conductor having two concentric shieldings. The middle conductor and the first shielding form forward and return conductors and the second shielding is connected to ground at both ends.

Abstract: A shock wave generator for an installation for non-contacting disintegration of calculi in the body of a life form has a coil with spirally arranged turns and a membrane formed of an electrically conductive material lying opposite said coil and terminating a space filled with a fluid, the coil being connectable to a high-voltage supply. To assure a high useful life of the membrane without a significant reduction in the efficiency of conversion of electrical energy into shock energy, a distance increased in comparison to regions of low voltage difference is present between the coil and the membrane in regions of high voltage difference between windings of the coil and the membrane.