Abstract: A G.M. tube environment radiameter including a sensitivity degradation monitoring device, comprising: a cyclic counter circuit for counting the pulses coming from the G.M. tube; b) a power operated moveable support for a weak radioactive source, adapted to alternatively move said source between two stable positions, a first position in which the source is reproducibly located close to the G.M. tube so as to cause it to generate pulses of the same magnitude order as the pulses generated under action of the standard background environment radioactivity, and a second position in which the source intensity is negligible with respect to the one caused by the standard background radioactivity; a circuit for measuring and storing the pulse intensities generated by the radioactive source when it is close to the G.M. tube, both in the test stage and in subsequent times as well as for performing the ratio of said pulse intensity values.

Abstract: A scanner for scintigraphy of the entire body, comprising: a frame provided with horizontally and lengthwise located guides; a carriage, movable with respect to the frame, along said guides, and provided with transversely slidable supports for one or two rods supporting the detectors; one or two rods slidable transversely on said supports, on said rods being mounted the detectors; one or more recording devices for the scintigraphic image; comprising a stationary rail parallel to the bed for the patient, and rolling means suitable to cause the sliding movement guided by the rail, of the frame with the carriage, the rods with the detectors and the recording devices, the rail being so located that most of the scanner slides between the rail and the patient bed, this too stationary, during the longitudinal scanning movement on the entire body.