RADIO-TYPE IN-SUBJECT INFORMATION ACQUISITION SYSTEM AND OUTSIDE-SUBJECT DEVICE

摘要

A pill inserted into a body of a patient acquires in vivo information on the body of the patient. A receiver receives the in vivo information on the body of the patient from the pill through a receiving antenna. The receiver includes batteries 61 and 61, and a switching circuit 63 that switches between the batteries 61 and 61 according to respective residual amounts of the batteries. The receiver also includes an AC power source 64, which allows charging to the batteries 61 and 61. A residual amount detecting circuit 65 detects a residual amount of an output of the receiver, and the result of detection is informed by an informing unit 66.