Abstract: The disclosure relates to a controllable and/or self-controlling object comprising a monolithically integrated entropy source having: a photon source that is designed to emit photons, the photon source comprising a first outer shell, said first outer shell being formed by a first base surface, a first top surface, and at least one first side surface connecting the first base surface and the first top surface to one another; and a photon detector that is designed to detect the photons emitted by the photon source, the first base surface of the photon source being arranged so as to face the photon detector.

Abstract: The invention relates to an arrangement with a medical gamma probe and an optical module arranged on the medical gamma probe, said optical module having a light source which emits light rays during operation and is configured to generate an optical pointer in a detection region of the medial gamma probe using the light rays from the light source.

Abstract: The invention relates to an arrangement with a medical gamma probe and an optical module arranged on the medical gamma probe, said optical module having a light source which emits light rays during operation and is configured to generate an optical pointer in a detection region of the medial gamma probe using the light rays from the light source.

Abstract: The invention relates to a medical probe for measuring radioactive radiation, comprising a housing that can be held single-handedly. A detector device (2) comprising a semiconductor diode is disposed in the housing and produces signals that interact with at least one of the following radioactive radiations: &agr;&bgr;+, &bgr;−and &ggr; radiation. A signal processing device (3) processes the signals produced by the detector device (2). A power supply device (4) provides the detector device (2) and the signal processing device (3) with power. The inventive probe is especially characterized in that a reproduction device (5) for reproducing the signals processed by means of the signal processing device (3) is mounted in the housing (1). The inventive device provides a compact measuring system that facilitates an (especially wireless) flexible intraoperative and extraoperative, local measurement of radioactively labeled tissue without requiring additional appliances.