Abstract: The present invention relates to a method of controlling access to audio-visual programs on a digital receiver of audio-visual programs, wherein it comprises, regardless of the program, a phase of locking the current program generated by an manual action during the current programme displaying. In this way, the user can, with the aid of a particularly simple command, lock or unlock the program currently being displayed.

Abstract: An examination bed, notably for RMN or tomodensitometry, which includes a chassis, an examination plateau, and a mechanism for driving movement of the plateau with respect to the chassis and with respect to the apparatus wherein the moving mechanism includes a moving assembly with respect to the plateau and the chassis, elongated in its shape with one end being movable with respect to the chassis and whose other end is movable with respect to the plateau.

Abstract: The invention relates to a method for processing locating pulses supplied by a gamma camera and to a gamma camera utilizing this method. In accordance with the invention, locating pulses (X.sup.+,X.sup.-,Y.sup.+,Y.sup.-) are taken into account by a calculator circuit (12) which performs the standardization of an (X,Y) coordinate signal proportional to the difference of two locating pulses (X.sup.+ -X.sup.-) along an axis by the sum of these same two locating pulses (X.sup.+ +X.sup.-) along this axis.

Abstract: In a gamma camera utilizing a collimator, a scintillator, a network of photomultiplier tubes and an array of matrices of resistors, the balanced pulses supplied by this array are measured by integration in an integrator stage which supplies locating pulses. These locating pulses serve the purpose of generating coordinate signals applied to a visual display device. Prior to integration, the direct interference components affecting the balanced pulses are eliminated by capacitive coupling of the array of matrices to the integrator stage. In order to prevent this coupling introducing means direct components at high counting rates, the output of this coupling means is periodically forced to assume the value of a base potential.