Patent ID: 8162821

Claim:
A body-insertable device system, comprising: a casing to be introduced into a subject and including at least one imaging unit having a specific observing direction for the subject; liquid to be introduced into the subject; and a drive unit which changes a position of the casing in the liquid, wherein a specific gravity of the casing is smaller than a specific gravity of the liquid, and the drive unit includes: a magnetic material provided in the casing; a magnetic field generator which generates a magnetic field for the magnetic material and is placed outside of the subject; and a horizontal position controller which causes the magnetic field generator to generate a magnetic attracting force in a horizontal direction for the magnetic material to control a horizontal position of the casing in the liquid, wherein the drive unit includes a vertical position controller which causes the magnetic field generator to generate a magnetic attracting force in a vertical direction for the magnetic material to control a vertical position of the casing in the liquid, and the vertical position controller causes the casing to be kept under a liquid surface of the liquid and the horizontal position controller changes the horizontal position of the casing in the liquid, and wherein the drive unit includes a position detector for detecting a position of the casing in the subject; and the vertical position controller controls the magnetic field generator based on the position detection result of the position detector to control the vertical position of the casing in the liquid.