Abstract: A position detecting device includes a detected object that includes a circuit with an internal coil; a magnetic-field generator that includes a magnetic-field generating coil for generating a magnetic field with respect to a detection space of the detected object; detection coils that detect an induced magnetic field generated from the internal coil caused by the magnetic field; a magnetic-field-generating-coil switching unit that selects a magnetic-field generating coil from the magnetic-field generating coils in the magnetic-field generator; a storage unit that stores predetermined information for selecting a magnetic-field generating coil from the magnetic-field generating coils in the magnetic-field generator; and a control unit that controls the magnetic-field-generating-coil switching unit to select the magnetic-field generating coil to be operated among the magnetic-field generating coils in the first magnetic-field generator, based on at least one of a position and a direction of the detected object

Abstract: The specific gravity of a capsule-type endoscope according to the invention is set to be lower than that of liquid in an organ, so that the capsule-type endoscope is floated on a liquid surface of the liquid. A center of gravity of the capsule-type endoscope is set to a position deviated from a center of a casing, so that the casing is maintained in a specific floating position while being floated on the liquid surface. A boundary between the casing and the liquid surface is formed within a projection plane, which is obtained by projecting the casing in the specific floating position perpendicularly to the liquid surface, at a position excluding an outer periphery of the projection plane Ka.

Abstract: The present invention realizes a medical device guidance system capable of improving propulsion control characteristic.

Abstract: In a capsule 3 as a medical apparatus inserted into a body cavity, the lengthwise direction of the capsule 3 is used as an insert axis, a manipulation/input device 8, which is magnetized in a direction orthogonal to the insert axis, is disposed at the center position of the insert axis. A magnetic field generation device 4, which is disposed outside of a body, is caused to generate a vibration magnetic field in a direction parallel with the insert axis of the capsule 3 by turning on a vibration (ON/OFF) switch 8f of a manipulation/input device 8 so that couples having lines of action, which are in parallel with the insert axis, are exerted on the capsule 3, thereby the capsule 3 executes a swiveling motion about the insert axis and smoothly travels along a cavity organ.

Abstract: A medical guidance system and a control method of a medical device are provided, which may increase the drive force of a medical device and improve controllability thereof. The medical guidance system has a medical device that includes a biologic information acquisition unit that acquires biologic information of the inside of a body cavity and a magnet that generates drive force in response to a magnetic field exerted from the outside of a body, a magnetic field generation unit 101 that generates the magnetic field to be exerted on the magnet from the outside of a body, and a displacement detection unit 105 that detects displacement being an angle formed between the magnetization direction of the magnet and the field direction of the magnetic field generated by the magnetic field generation unit 101 at the position of the medical device; wherein the magnetic field generation unit 101 is controlled based on the displacement.

Abstract: A medical device position detection system and a position detection method of a medical device guidance system, which are capable of detecting a direction of the medical device accurately, are provided.

Abstract: An observation apparatus includes a light radiating unit that radiates a plurality of element lights, each of which has a limited wavelength band, to an observation target; a light detecting unit that detects the plurality of element lights reflected by the observation target in a plurality of patterns by changing a weight for each of the element lights; and a processing unit that performs a procedure of separating a component of each of the element lights from a plurality of detection results of the light detecting unit based on the weight for each of the element lights of the light detecting unit.

Abstract: A capsule medical device includes a capsule casing that contains an illumination board, an imaging board, a transmission board, and a control board on which functional components are mounted, and a sheet-like battery that supplies power to the functional components. The sheet-like battery is rolled up to be a pole shape and located between cutout parts of the imaging board, the transmission board, and the control board and the inner wall of the capsule casing.

Abstract: A medical apparatus main body such as a capsule main body inserted in the body cavity includes a thrust generating mechanism such as a spiral projection. The medical apparatus main body further forms an information providing unit comprising at least one of a storing unit for storing a state of the thrust generating mechanism and a direction detecting unit for detecting the direction of the medical apparatus main body. An input unit instructs a thrust generating direction of the thrust generating mechanism and thus a control unit changes continuously or the like a thrust generating state of the thrust generating mechanism based on information from the information providing unit.

Abstract: A system for guiding capsule medical device includes a capsule medical device that includes a capsule casing including an imaging unit and a permanent magnet magnetized in a direction relatively fixed with respect to an upward and downward direction of an imaging surface of the imaging unit. The capsule medical device has a center of gravity deviated from a geometric center of the casing toward a direction different from a magnetization direction of the permanent magnetic. In the capsule medical device, a plane parallel to the imaging surface and a plane parallel to the magnetization direction and a deviation direction of the center of gravity with respect to the geometric center form an intersection line. The system further includes a magnetic guidance device; and an image display device displaying an in-vivo image such that a direction of the intersection line conforms to an upward and downward direction of a screen.

Abstract: A system for guiding capsule medical device is provided with a capsule medical device, a magnetic guidance device, and an image display device. The capsule medical device is provided with an imaging unit for imaging an in-vivo image of a subject and a permanent magnet magnetized in a known direction relatively fixed with respect to an upward and downward direction of an imaging surface of the imaging unit in a capsule casing, and has a center of gravity at a location deviated from a geometric center of the capsule casing in a direction parallel to a plane parallel to a magnetization direction of the permanent magnet and an imaging direction of the imaging unit and different from the magnetization direction of the permanent magnet, and maintains a specific state in which the magnetization direction of the permanent magnet and the imaging direction of the imaging unit are parallel to a vertical plane in liquid introduced into the subject.

Abstract: A system for guiding capsule medical device is provided with a capsule medical device, a magnetic guidance device, an operation input unit, a control device, and an image display device. The capsule medical device is includes therein a first and second imaging units that image images in imaging directions different from each other and a permanent magnet. The magnetic guidance device applies a magnetic field to the permanent magnet to magnetically guide the capsule medical device in a subject. The operation input unit receives operation information to operate magnetic guidance of the capsule medical device. The control device controls the magnetic guidance device to magnetically guide the capsule medical device in response to the operation information input through the operation input unit.

Abstract: A magnetic actuator includes a housing; a first permanent magnet and a second permanent magnet placed in the housing and being relatively rotatable in a plane including a magnetization direction; a magnetic-field generating unit outside of the housing, the magnetic-field generating unit generating a magnetic field that relatively rotates the first permanent magnet and/or the second permanent magnet in a direction such that the first permanent magnet and the second permanent magnet generate a repulsive force against each other; and a first guiding portion provided in the housing to regulate a direction in which the first permanent magnet and the second permanent magnet relatively move by the generated repulsive force.

Abstract: A capsule medical apparatus includes a needle driving unit that punctures an internal region of a subject with an injection needle and pulls out the injection needle from the internal region, a liquid injection unit that injects a liquid into the internal region through the injection needle, and a leak prevention unit that prevents the liquid that is injected into the internal region from leaking from the internal region.

Abstract: A body-insertable apparatus system includes: a body-insertable apparatus having a light emitting unit that emits a light having a low-reflectance wavelength and a light having a high-reflectance wavelength to a detection-target site and an imaging unit that receives the lights to take an in-vivo image of a subject; and a detector that detects the detection-target site of a detection-target area in the subject based on an amount of the light having the high-reflectance wavelength and an amount of the light having the low-reflectance wavelength of an area of the in-vivo image, the area of the in-vivo image corresponding to the detection-target area.

Abstract: A capsule endoscope includes a capsule-shaped casing and an imaging unit for taking an image of an inside of an organ in a state where the capsule endoscope is floating in liquid introduced inside the organ of a subject. Specific gravity of the capsule endoscope to the introduced liquid is ?; a plane divides the capsule endoscope such that a volume ratio is to be ?:1??. A straight line that connects a center of volume of a portion whose volume ratio is ? and a center of gravity of the capsule endoscope is substantially perpendicular to the plane. The center of gravity is present at a position farther distant from the plane than the center of volume. A surface of a boundary of a field of view that forms an angle of view of the imaging unit and the plane do not intersect outside the capsule endoscope.

Abstract: An operating device operates a capsule endoscope with 6 degrees-of-freedom motion by using a magnetic field generator with respect to the capsule endoscope inserted into the subject. The operating device includes an operating unit including a fixed unit and a movable unit, and a force sensor incorporated in the operating unit. The operating unit has a three-dimensional shape substantially identical to the capsule endoscope and is a holdable size. The force sensor detects force information of the movable unit when the movable unit of the operating unit is operated once or continuously. The force information detected by the force sensor is output as instruction information for instructing 6 degrees-of-freedom motion of the capsule endoscope.

Abstract: A lumen passability checking device has a capsule shape and a size capable of being introduced into a body. The lumen passability checking device includes a first insoluble portion that is made of a material insoluble in the body, and that is provided as a thin portion, excluding a part of a surface of a capsule shaped body; a soluble portion that is made of a material soluble in the body, forms the capsule shaped body, and is provided in the first insoluble portion, including the part of the surface of the capsule shaped body, the part being exposed to outside; and a second insoluble portion that is made of a material insoluble in the body, and that divides the soluble portion to form a dissolution route in the soluble portion, the dissolution route progressing from the part of the surface to inside.

Abstract: In a capsule 3 as a medical apparatus inserted into a body cavity, the lengthwise direction of the capsule 3 is used as an insert axis, a manipulation/input device 8, which is magnetized in a direction orthogonal to the insert axis, is disposed at the center position of the insert axis. A magnetic field generation device 4, which is disposed outside of a body, is caused to generate a vibration magnetic field in a direction parallel with the insert axis of the capsule 3 by turning on a vibration (ON/OFF) switch 8f of a manipulation/input device 8 so that couples having lines of action, which are in parallel with the insert axis, are exerted on the capsule 3, thereby the capsule 3 executes a swiveling motion about the insert axis and smoothly travels along a cavity organ.

Abstract: A lumen passability checking device includes: a soluble unit made of a material that dissolves in a body and forming a structure of a capsule shape; and an insoluble unit made of a material that does not dissolve in the body and forming a thin film that covers the surface of the soluble unit excluding an opening. The shape of the insoluble unit is maintained by the soluble unit, and the insoluble unit collapses when the soluble unit dissolves and collapses.