This application provides a
body temperature measurement system and a body temperature sensor for use in a
magnetic resonance imaging (MRI) environment. The
body temperature measurement system includes a body temperature sensor and a
medical device. The body temperature sensor includes a
fiber optic temperature probe, a connector, and a calibration unit. The
fiber optic temperature probe includes an
optical fiber and an active material disposed at the first end of the
optical fiber. The connector is used to connect to the
medical device, and the second end of the
optical fiber passes through the connector. The calibration unit is disposed on the connector and is used to store first information corresponding to the
fiber optic temperature probe. The
medical device includes a
processing unit, which includes a light-emitting circuit, a receiving circuit, and a computing circuit. The
processing unit is used to obtain the
body temperature measurement result based on the first information and the electrical
signal. This application embodiment places the calibration unit at the body temperature sensor end, allowing users to quickly obtain the body
temperature measurement result based on the information in the calibration unit after replacing the body temperature sensor, ensuring high-precision measurement without requiring factory calibration.