Abstract: A method for collecting and a device for sensing at least one electrophysiological signal, as well as to a system including at least one such device. The device for sensing at least one electrophysiological signal from a living subject subjected to at least one electromagnetic field, includes elements, such as electrodes, which are placed on the subject for the physical acquisition of at least one electrophysiological signal and at least elements for the pre-processing of the at least one sampled electrophysiological signal. The sensor device (1) is characterised in that it also includes additional elements (7, 8) for measuring or determining at least one characteristic of the electromagnetic environment at or close to the electrophysiological signal acquisition point(s) or zone(s) on the subject.

Abstract: The flow of blood in a vessel (G) in a living being (P) which is exposed to a magnetic field (B) is determined by measuring the potential difference (?V) between at least two points (P1, P2) next to the vessel (G). The potential difference (?V) is produced on the basis of the Hall effect by the moving charge carriers (Q) in the blood in the presence of the magnetic field (B). When recording an ECG, the cardiac output can be determined in this manner under the influence of a magnetic field (B). At the same time, the ECG signal can be corrected in the knowledge of the component (T) of the ECG signal (E) which can be attributed to the Hall effect.

Abstract: To transmit electrophysiological data from an interference region (S) of an MRI arrangement (20) to an evaluation and/or display unit (10) a signal is handled in a recording arrangement (1) arranged within the interference region (S). The ECG signal (E) is first subjected to analogue above-linear compression, is then digitized and is transmitted as a digitized signal (D) to an evaluation and/or display unit (10). The digital signal (D) is subjected to above-linear digital expansion in the evaluation and/or display unit (10).

Abstract: The flow of blood in a vessel (G) in a living being (P) which is exposed to a magnetic field (B) is determined by measuring the potential difference (&Dgr;V) between at least two points (P1, P2) next to the vessel (G). The potential difference (&Dgr;V) is produced on the basis of the Hall effect by the moving charge carriers (Q) in the blood in the presence of the magnetic field (B). When recording an ECG, the cardiac output can be determined in this manner under the influence of a magnetic field (B). At the same time, the ECG signal can be corrected in the knowledge of the component (T) of the ECG signal (E) which can be attributed to the Hall effect.