摘要:
A position detecting system including: a detected object disposed in a space; and an external device disposed outside the space, wherein the detected object includes a resonant circuit, and the external device includes at least two drive coils; at least two drive-signal input units; at least one sense coil; a signal adjustment unit that adjusts a phase or amplitude of a drive signal using an evaluation function for evaluating the phase or the amplitude, based on an intensity of the magnetic field; and a position deriving unit that derives a position of the detected object based on a magnetic field detected by the sense coil, wherein the evaluation function derives a solution by adding or multiplying a weight set according to a positional relation between each drive coil and each sense coil to or by an intensity of a magnetic field detected by the sense coils.
摘要:
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. Included are a medical device introduced into a subject's body; a magnetic field response part that is disposed in the medical device, responds to a magnetic field by virtue of possessing a magnetization direction, and guides the medical device; a magnetic field generation part forming the magnetic field within the subject's body; a direction detection magnetic field control part generating a direction detection magnetic field from the magnetic field generation part for detecting the direction of the medical device; a response detection part detecting a response of the magnetic field response part due to the direction detection magnetic field; and a direction calculating part calculating the direction of the medical device according to the direction of the direction detection magnetic field and a detection result of the response detection part.
摘要:
A body-insertable device including a resonance circuit for emitting a resonance magnetic field by being induced by a drive magnetic field received from the outside. An external device for deriving position information of the resonance circuit by using a detection signal of detected resonance magnetic field. The external device includes a drive coil driving unit for outputting a drive signal having a predetermined frequency, a drive coil for receiving the output drive signal and generating the drive magnetic field, and a drive magnetic field generation control unit for calculating an amplitude value of the drive signal by using a current amplitude value of the drive signal, detecting a degree of stability indicating whether a sharp change occurs in the drive magnetic field based on the calculated amplitude value, and controlling the deriving of a position information based on the detected degree of stability in the drive magnetic field.
摘要:
A system includes a body-insertable apparatus disposed while introduced in a subject in a detection space, and an external apparatus disposed on the outside of the subject. The body-insertable apparatus includes a first switch for connecting/interrupting a resonance circuit and an oscillation circuit or a ground line. The external apparatus includes a drive coil driving unit for outputting a drive signal having the resonance frequency; a drive coil for generating the drive magnetic field in the detection space in accordance with the drive signal; and a second switch for connecting/interrupting the drive coil driving unit and the drive coil. The second switch connects the drive coil driving unit and the drive coil when the first switch is off, and disconnects them when the first switch is on. The resonance circuit generates the resonance magnetic field in accordance with the induction signal or the drive magnetic field.
摘要:
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.
摘要:
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.
摘要:
A capsule endoscope system includes a capsule endoscope which attaches irradiation time of illuminating light required to pick up an image of an object to an item of image data, a magnetic field generating apparatus which generates a guidance magnetic field, an operation section which allows at least one of position and orientation of the capsule endoscope to be changed by manipulating the guidance magnetic field, a control section which attaches posture of a subject, an operating history of the operation section, and an output history of the guidance magnetic field to the item of the image data, a storage unit which stores the item of the image data, and an image play control section which determines, based on at least one piece of the information attached to each item of the image data, whether or not it is necessary to play and display the item of the image data.
摘要:
To provide a position detecting system including a detected object disposed in a detection space and an external device disposed outside the detection space. The detected object includes a resonant circuit that generates a resonant magnetic field according to a driving magnetic field formed in the detection space, and the external device includes at least two drive coils that form the driving magnetic field in the detection space, at least two drive-signal input units that respectively input a drive signal for forming the driving magnetic field to the drive coils, at least one sense coil that detects a magnetic field formed in the detection space, a signal adjustment unit that adjusts a phase and an amplitude of the drive signal input to each of the drive coils by the drive-signal input units, based on a magnetic field detected by the sense coil, and a position deriving unit that derives a position of the detected object based on the magnetic field detected by the sense coil.
摘要:
A magnetically guiding system includes: a capsule medical device that has a magnet provided therein; an information acquiring unit that acquires physical information about magnetic guiding of the capsule medical device; a magnetic field generating unit that generates a magnetic field for magnetically guiding the capsule medical device; and a control unit that sets a magnetic field condition based on the physical information acquired by the information acquiring unit and controls the magnetic field generating unit to generate a magnetic field corresponding to the magnetic field condition.
摘要:
A position detecting system having a predicting unit for calculating a moving amount by which a detected object is predicted to move between a first time and a second time after a predetermined time from the first time, and for predicting at least one of a position and a direction of the detected object at the second time, and a control unit for controlling a position detecting unit based on the at least one of the position and the direction of the detected object at the second time predicted by the predicting unit.