| 摘要 |
A stethoscope for use with nuclear magnetic resonance (NMR) screenings in order to supervise a patient, including a bell chest piece adapted to pick up audible heart and breathing sounds or other bodily sounds from the patient, a flexible hollow tube connected at one end thereof to the bell chest piece and adapted to transmit audible heart and breathing sounds from the bell chest piece. The novel features of the invention are, a microphone member adapted to be arranged at the opposite side the tube outside the zone of the maximum field strength of the NMR equipment and adapted to convert the acoustic signals into corresponding electrical signals, an optical transmitter to which the microphone member is connected and from which optical signals are transmitted to the surrounding in at least one direction, the optical signals corresponding to the electrical signals, and at least one receiver for receiving the optical signals from the optical transmitter and for converting the optical signals into electrical signals corresponding to said audible sounds. |
