Patent Number: 8,821,398

Title: Capsule medical apparatus guidance system

Abstract: A system includes a capsule body having a casing introduced into a subject to perform, in liquid, examination of or treatment on the interior of the subject, the casing containing a permanent magnet, a mass of the casing excluding the magnet being set to be less than a product of a volume of the casing and a density of the liquid; a magnetic field generator that generates a magnetic attraction for the magnet to guide the capsule body; and a magnetic field generation device that controls the magnetic field generator to generate the magnetic attraction by setting a maximum value of the generated magnetic attraction vertically upward to the capsule body, to be equal to a maximum value of the generated magnetic attraction vertically downward to the capsule body, and by setting the maximum values to be less than a value obtained by multiplying a mass of the magnet by a gravitational acceleration.

Inventors: Kawano; Hironao (Machida, JP), Reinschke; Johannes (Nuremberg, DE), Schmidt; Wolfgang (Erlangen, DE)

Assignee: Olympus Medical Systems Corp.

International Classification: A61B 5/07 (20060101)

Expiration Date: 9/02/12018