Abstract: Disclosed is a display device which receives and displays ECG and other signals from a patient in an MRI (magnetic resonance imaging) control room, which display device comprises a video converter which outputs video signals corresponding to the displayed information, a magnetically shielded cable which transmits the output of the video converter to a location near the patient and a display unit which receives the video signals from the magnetically shielded cable and display ECG and other data in a location near the patient as accommodated in a magnetically shielded housing. With this display device, ECG and other signals can be monitored accurately within the MRI booth without adverse effects on the MRI unit.

Abstract: Detection signals (about several microvolts) of bio-electrical and bio-physical phenomena from a patient are amplified to a prescribed level through a magnetically shielded preamplifier, and displayed as waveforms on the screen of a display device installed at a place free from magnetic effects.The waveforms are, however, not amplified so much by the preamplifier in order to prevent formation of distortion in the detection signals.The waveforms displayed on the screen are taken by a video camera, and video signals are picked up from the camera. The video signals are, unlike the feeble detection signals directly obtained from the human body, stable image information, and when they are transmitted again to the place of magnetic resonance CT apparatus (that is, the place exposed to magnetic effects), they are hardly influenced by the magnetism.The video signals are displayed again as waveforms on a magnetically shielded video display device.