System for discriminating between magnetic fields using an implanted medical device

A method, comprising:

• under control of one or more processors,
• detecting, with a first sensor, a magnetic field in an environment of an implantable medical device (IMD);
• discriminating between a first magnet mode and a second magnet mode based on environmental data obtained from a second sensor;
• and
• switching the mode of operation with electronic circuitry based on discriminating between the first magnet mode and the second magnet mode.

An implantable medical device (IMD), comprising:

• electronic circuitry;
• a first sensor configured to detect a magnetic field in an environment of the IMD;
• one or more processors;
• and
• a memory coupled to the one or more processors, wherein the memory stores program instructions, wherein the program instructions are executable by the one or more processors to:
• switch the IMD into a first magnet mode in response to detecting the magnetic field;
• discriminate between the first magnet mode and a second magnet mode based a strength of the magnetic field;
• select between the first magnet mode and the second magnet mode based on noise detected by the IMD;
• and
• switch a mode of operation with the electronic circuitry from the first magnet mode to the second magnet mode based on the noise detected.