Living body observation system and method of driving living body observation system

A living body observation system, comprising:

• an in vivo observation apparatus including:
• an in vivo information acquisition section for acquiring information in a living body;
• a power supply section for supplying driving power of the in vivo information acquisition section;
• a magnetic field detection section for detecting an alternating magnetic field from outside and outputting a detection result as an electric signal;
• and a power supply control section for controlling a supply state of driving power supplied from the power supply section to the in vivo information acquisition section, based on the electric signal;
• and
• a magnetic field generation section which is disposed outside the in vivo observation apparatus and generates the alternating magnetic field, the magnetic field generation section including:
• a transmission antenna which includes a transmission coil which generates the alternating magnetic field for controlling activation and deactivation of the in vivo observation apparatus and a ferromagnetic material which is arranged in an outer periphery of the transmission coil and decreases a leakage of the alternating magnetic field in surroundings, and transmits the alternating magnetic field;
• a driver for driving the transmission antenna;
• and a power supply for supplying power to the driver.