Abstract: An injection needle assembly includes an injection needle, a fitting portion, and a hub. The fitting portion is formed into a cylindrical shape and has one end serving as a fitting opening. The fitting portion includes a female taper shape in which an inner diameter of a cylindrical hole of the fitting portion becomes smaller toward an inner side. The hub includes the fitting portion for holding the injection needle. The injection needle assembly is used such that the female taper shape of the fitting portion is fitted to a drug discharge tube, which has a male taper shape in which an outer diameter of a cylinder becomes smaller toward a tip. When the male taper shape of the drug discharge tube has a taper ratio of N/100, the female taper shape of the fitting portion 12 is formed to have a taper ratio of M/100, where M>N.

Abstract: An injection needle assembly includes an injection needle, a fitting portion, and a hub. The fitting portion is formed into a cylindrical shape and has one end serving as a fitting opening. The fitting portion includes a female taper shape in which an inner diameter of a cylindrical hole of the fitting portion becomes smaller toward an inner side. The hub includes the fitting portion for holding the injection needle. The injection needle assembly is used such that the female taper shape of the fitting portion is fitted to a drug discharge tube, which has a male taper shape in which an outer diameter of a cylinder becomes smaller toward a tip. When the male taper shape of the drug discharge tube has a taper ratio of N/100, the female taper shape of the fitting portion 12 is formed to have a taper ratio of M/100, where M>N.

Abstract: A method of displaying an image in a subject is provided. The method including: capturing an image using a capsule type medical device introduced into the subject; generating a wireless signal of the image; receiving the wireless signal of the image at the outside of the subject with an external device; and displaying the image based on the received signal, on a first display portion contained in the same housing as the external device.

Abstract: A method of transmitting images in a subject to an outside of the subject using a wireless signal is provided. The method including: (a) transmitting to the outside of the subject a first signal corresponding to a first image obtained using a first imaging device, by timing on a first illumination device for illuminating the subject to capture the first image of the subject; (b) transmitting to the outside of the subject a second signal corresponding to a second image obtained using a second imaging device, by turning on a second illumination device for illuminating the subject to capture the second image of the subject; and (c) repeating (a) and (b), where at least initiation of the transmitting the first signal and initiation of the transmitting the second signals is alternately performed and the first and second illumination devices are alternately turned on coincidentally with transmission periods of the first and second signals, respectively.

Abstract: An edge portion of an endoscope inserting portion includes an observation optical system, a first treatment-tool oscillating base which guides, in a first direction, a first treatment tool guided via a first channel for inserting the treatment tool, and a second treatment-tool oscillating base which guides, in a second direction, a second treatment tool guided via a second channel for inserting the treatment tool. Upon endoscope treatment for the lesion portion using the first and second treatment tools which are projected from the edge openings of two first and second channels for inserting the treatment tool and which are guided by the two first and second treatment-tool oscillating bases, one of the first and second treatment tools is moved to the outside of a field of view of an endoscope image as needed.

Abstract: A battery self-containing body, which self-contains a battery or a battery accommodating body, which accommodates a battery removably is attached to a capsule body including a drive circuit for driving an imaging device and an illuminating device. Thus, the power supply can be turned ON easily. In addition, the inside portion is sealed water-tightly. Thus, the battery self-containing body or a battery can be exchanged easily, which allows the easy reuse. The direction of the visual field of the imaging device is diagonal with respect to the axis of the capsule body. Furthermore, spiral-shape projections are provided on the peripheral surface of the cylinder form. Thus, the rotation allows the surface of canal cavity wall to be examined easily.

Abstract: A method of transmitting images in a subject to an outside of the subject using a wireless signal is provided.

Abstract: A capsule-type medical device which is advanced through a digestive tract of a human being or animal for conducting an examination, therapy, or treatment is provided. The capsule-type medical device includes: a plurality of capsule bodies; a soft linking unit which links the plurality of capsule bodies and has an outer diameter less than that of any of the capsule bodies; and a joining member which joins two or more of the plurality of capsule bodies in a prescribed position.

Abstract: A capsule-type medical device which is advanced through a digestive tract of a human being or animal for conducting an examination, therapy, or treatment is provided. The capsule-type medical device includes: a plurality of capsule bodies; a soft linking unit which links the plurality of capsule bodies and has an outer diameter less than that of any of the capsule bodies; and a joining member which joins two or more of the plurality of capsule bodies in a prescribed position.

Abstract: A medical treatment method comprises orally inserting a first endoscope having a first treatment tool provided thereto into a body cavity, inserting a first insertion member insertion support tool from at least one of abdominal and transdermal cavities into the body cavity, inserting a second endoscope having a second treatment tool provided thereto into the body cavity through the first insertion member insertion support tool, grasping a lesioned part by the second treatment tool inserted into the body cavity by the second endoscope, cutting the lesioned part by the first treatment tool inserted into the body cavity by the first endoscope, and collecting the lesioned part.

Abstract: An endoscope system consists mainly of: an endoscope having a solid-state imaging device and an objective optical system that converges an object image on said solid-state imaging device; and a signal processing unit that processes an image signal produced by the endoscope so as to produce a video signal. The objective optical system includes an optical phase modulation member. The optical phase modulation member exhibits a response of 0.2 or more derived from an optical transfer function relative to a spatial frequency on the solid-state imaging device determined based on the Nyquist theorem, that is, a Nyquist frequency, over a wider range of distances than a depth of field offered by an objective optical system not having the optical phase modulation member.

Abstract: A capsule-type medical device which is advanced through a digestive tract of a human being or animal for conducting an examination, therapy, or treatment is provided. The capsule-type medical device includes: a plurality of capsule bodies; a soft linking unit which links the plurality of capsule bodies and has an outer diameter less than that of any of the capsule bodies; and a joining member which joins two or more of the plurality of capsule bodies in a prescribed position.

Abstract: The capsule-type medical device in accordance with the present invention is advanced the inside of the somatic cavities and lumens of humans being or animals for conducting examination, therapy, or treatment. The capsule-type medical device comprises a plurality of hard units and a soft linking unit which links the plurality of hard units and has a diameter less than that of any of the hard units, wherein one of the plurality of hard units is different in size from other hard units.

Abstract: A treatment instrument passage channel through which a treatment instrument can be passed lies through an elongated insertion unit that is inserted into a body cavity or the like. The distal opening of the treatment instrument passage channel opens onto the distal part of the insertion unit. A treatment instrument swing stand having a hole, through which the distal part of a treatment instrument led out of the distal opening is passed, bored therein is disposed near the distal opening so that the treatment instrument swing stand can swing freely. The treatment instrument swing stand is manipulated by proximally pulling angling wires. Thus, the distal part of the treatment instrument is swung from a position near the center of a field of view in both the rightward and leftward directions of an endoscope. Thus, the mucosa of a lesion can be resected easily while being caught in the field of view.

Abstract: An endoscope including; a fixing member detachably mounted to a distal end portion of an endoscope insertion part for detachably fixing and holding a distal end portion of an indwelling tube or a distal end portion of a guide member for guiding the indwelling tube, both of which are provided along the axial direction of the insertion part, to the distal end portion of the insertion part.

Abstract: An edge portion of an endoscope inserting portion includes an observation optical system, a first treatment-tool oscillating base which guides, in a first direction, a first treatment tool guided via a first channel for inserting the treatment tool, and a second treatment-tool oscillating base which guides, in a second direction, a second treatment tool guided via a second channel for inserting the treatment tool. Upon endoscope treatment for the lesion portion using the first and second treatment tools which are projected from the edge openings of two first and second channels for inserting the treatment tool and which are guided by the two first and second treatment-tool oscillating bases, one of the first and second treatment tools is moved to the outside of a field of view of an endoscope image as needed.

Abstract: Wear resistant member for electronic equipment comprises a silicon nitride sintered body that contains conductivity enhancing particles, and has electrical resistivity in the range from 1 to 105 &OHgr;·m. In silicon nitride sintered body, agglomeration of conductivity enhancing particles in which distance between conductivity enhancing particles is less than 1 &mgr;m exists by 30% or less by area ratio per unit area. Wear resistant member is used for a bearing ball or the like, being applied in a rotation actuator of electronic equipment such as a magnetic recorder and optical disk drive. Malfunction of electronic equipment due to static electricity may be cancelled due to electrical resistivity that silicon nitride sintered body has.

Abstract: A sentinel lymph node detecting system comprises an inserting portion with a small diameter which can be inserted into the body cavity, an X-ray detecting unit for two-dimensionally detecting X-rays, and an optical imaging unit 3 for taking visible-light images, which are mounted to the tip of the inserting portion. The X-ray detecting unit and the optical imaging unit are disposed along the longitudinal direction of the inserting portion, and are closely disposed one to another so as to observe in the same direction. A radioactive tracer accumulated in sentinel lymph nodes is detected by the X-ray detecting unit. The X-ray detected image is smaller in size than the image taken by the optical imaging unit. Thus, sentinel lymph nodes can be quickly identified in a sure manner, and further, the load placed on a patient, such as the need to perform laparotomy, can be reduced.

Abstract: A medical treatment method comprises orally inserting a first endoscope having a first treatment tool provided thereto into a body cavity, inserting a first insertion member insertion support tool from at least one of abdominal and transdermal cavities into the body cavity, inserting a second endoscope having a second treatment tool provided thereto into the body cavity through the first insertion member insertion support tool, grasping a lesioned part by the second treatment tool inserted into the body cavity by the second endoscope, cutting the lesioned part by the first treatment tool inserted into the body cavity by the first endoscope, and collecting the lesioned part.

Abstract: An endoscope system in accordance with the present invention consists mainly of: an endoscope having a solid-state imaging device and an objective optical system that converges an object image on said solid-state imaging device; and a signal processing unit that processes an image signal produced by the endoscope so as to produce a video signal. The objective optical system includes an optical phase modulation member. The optical phase modulation member exhibits a response of 0.2 or more derived from an optical transfer function relative to up to a spatial frequency on the solid-state imaging device determined based on the Nyquist theorem, that is, a Nyquist frequency, over a wider range of distances than a depth of field offered by an objective optical system not having the optical phase modulation member.