Abstract: The electronic system includes a connection ring comprising a plurality of alternately conductive and insulating superposed layers, the superposed conductive layers being linked to one another by electrical links forming an interconnect network, said connection ring comprising an inner cavity, the electronic system also including a plurality of electronic functions that are arranged inside the inner cavity of said connection ring over a plurality of levels, with at least one electronic function per level, each of said electronic functions being linked to the connection ring at the level of the inner face of the latter.

Abstract: An ultrasonic masking system (1) comprises at least one resin (2) and a plurality of hollow spheres (4) embedded in the resin (2), forming a coating material having a reduced mass capable of hindering an analysis by ultrasonic detection.

Abstract: A compact detection device for a gamma camera comprises: several detectors (4a, 4b, . . . ) adjacent to each other to form a detection plane (4); a first ceramic substrate (1); a second substrate (3) on which the detectors are arranged; means (10b) of polarizing the detection plane and the signal processing means (10c) for the signal detected by the said detection plane, located in the first substrate; and a ground plane (2) placed between the first and the second substrates.