A radiology device for dosimetry, comprising: - at least one detector of gamma radiation , said device also comprising attachment means arranged for attaching at least one of the detectors to a part of the user's body, the attachment means comprising a neck brace for at least one of the detectors, characterized in that it further comprises: - acquisition means arranged for acquiring dosimetric data from each gamma radiation detector, - transmission means arranged for transmitting the acquired data to outside the device, - at least one battery arranged for storing electrical power and supply electricity to each detector, to the acquisition means and to the transmission means, the acquisition means being arranged for acquiring from each gamma detector : - a gamma radiation measurement per unit of time as a function of time, or - a gamma radiation measurement as a function of time, the device having a weight being less than one kilogram, the acquisition means comprising an acquisition electronic mean dedicated for each gamma radiation detector and integral with this detector; the at least one detector of gamma radiation comprising at least one first group and one second group , each group comprising at least one gamma radiation detector, the attachment means not being common for the first group and the second group , so that: - the attachment means comprise the neck brace for the first group , the first group comprising two detectors placed: ∘ on a front face of the neck brace, this front face being intended to be positioned around a neck extending longitudinally along an axis of the neck and on the side of the anterior face of this neck, and ∘ symmetrically with respect to a plane of symmetry so that the axis of the neck forms part of this plane of symmetry; - the second group is arranged for acting as a measurement reference for the first group . - at least one detector of gamma radiation , - acquisition means arranged for acquiring dosimetric data from each gamma radiation detector, - transmission means arranged for transmitting the acquired data to outside the device, - at least one battery arranged for storing electrical power and supply electricity to each detector, to the acquisition means and to the transmission means, - a gamma radiation measurement per unit of time as a function of time, or - a gamma radiation measurement as a function of time, - the attachment means comprise the neck brace for the first group , the first group comprising two detectors placed: ∘ on a front face of the neck brace, this front face being intended to be positioned around a neck extending longitudinally along an axis of the neck and on the side of the anterior face of this neck, and ∘ symmetrically with respect to a plane of symmetry so that the axis of the neck forms part of this plane of symmetry; ∘ on a front face of the neck brace, this front face being intended to be positioned around a neck extending longitudinally along an axis of the neck and on the side of the anterior face of this neck, and ∘ symmetrically with respect to a plane of symmetry so that the axis of the neck forms part of this plane of symmetry; - the second group is arranged for acting as a measurement reference for the first group . <EOS>