An endoscope system includes an endoscope having a position/angle sensor and an amplifying circuit, a memory configured to store output error sensitivity data and a first wiring resistance value, and a processor including a signal processing circuit configured to process an output signal from the amplifying circuit. The signal processing circuit corrects an error of the output signal based on a value obtained by multiplying a difference between the first wiring resistance value and a processor wiring resistance value by the output error sensitivity data.

For determining a precise orientation and positioning of an endoscope in an electromagnetic field, an endoscope device has a proximal insertion head and has a shaft extending distally therefrom having a center axis. The shaft extends with at least one elongated lumen through the device. A sensor rod has at least two sensor coils arranged with finite spacing in relation to one another in the longitudinal direction. The at least two sensor coils are oriented in relation to one another at a finite angle.

The application describes embodiments including, e.g., a measurement device comprising: a casing, a first magnet arranged within the casing such that it is rotatable out of an equilibrium orientation responsive to an external magnetic torque acting on the first magnet, a second magnet to provide a restoring torque to force the first magnet back into the equilibrium orientation responsive to an external magnetic torque rotating the first magnet out of the equilibrium orientation, allowing for a rotational oscillation of the first magnet, which is excited by the external magnetic torque, with a resonant frequency, and a temperature sensitive magnetic material to modify the resonant frequency.

A capsule endoscope according to one embodiment includes: a camera; a transceiver; a tubular receiving coil for receiving power supplied from an external power transmitting antenna via magnetic flux; a tubular capsule accommodating these components; and an X-ray marker to be used in location and orientation detection. In the capsule endoscope, a magnetic body is arranged along the inner periphery of the receiving coil, and a self-propelling drive device including an electromagnet and a permanent magnet is arranged in series with the receiving coil along the tubular axial direction of the capsule so that the permanent magnet does not enter the inside of the receiving coil.

An inflatable in-vivo capsule endoscope and method of operation is provided. The inflatable in-vivo capsule endoscope may include a sensing device for capturing in-vivo images and one or more permanent magnets for magnetically guiding the endoscope, housed interior to a capsule-shaped body. The inflatable in-vivo capsule endoscope may include an inflatable buoy attached externally to the capsule-shaped body. An inflation device may inflate the in-vivo capsule endoscope to reduce its specific gravity by injecting gas into the inflatable buoy, such that when the inflatable buoy is injected with an above threshold volume of gas, the inflatable in-vivo capsule endoscope floats in liquid. The inflatable in-vivo capsule endoscope may be magnetically guided via its permanent magnets when exposed to an externally generated magnetic field. A reduced magnetic field strength and external magnet size may be used to magnetically navigate an inflated capsule floating in liquid than a conventional uninflated capsule.

A position detection system includes: a cylindrical detection coil configured to detect a magnetic field generated by a magnetic field generation unit; and a calculation unit configured to calculate at least one of a position and a direction of the magnetic field generation unit based on the magnetic field detected by the detection coil. A relationship between a diameter Ds and a length Ls in a winding direction, of the detection coil, satisfies Formula (1), and each of coefficients G.sub.1, G.sub.2, and G.sub.3 in Formula (1) is respectively given by each of Formulae (2), (3) and (4).

[00001]$ .Math. G 1  ( L S D S ) 2 + G 2  ( L S D S ) + G 3 .Math. ≦ 0.2 ( 1 ) G 1 = - 1.73  10 - 5  D S 2 + 7.36  10 - 3  D S - 4.71  10 - 2 ( 2 ) G 2 = 3.74  10 - 5  D S 2 - 1.54  10 - 3  D S + 1.16  10 - 2 ( 3 ) G 3 = - 8.96< Method of placing medical insertion instruments in body cavity 09839349 · 2017-12-12 · Fujifilm Corporation, The Institute For Cancer Research · Takumi Dejima, Nobuyuki Torisawa, Masayuki Iwasaka, Paul Curcillo An endoscope and an illuminator are safely placed in a body cavity without generating a noticeable postoperative scar. A method of placing medical insertion instruments into a body cavity includes a first step of inserting, into the body cavity through a first opening formed on a body wall, an endoscope together with a first illuminator; and a second step of inserting, into the body cavity through a second opening formed at a position different from the first opening, a second illuminator. Preferably, the method further includes a third step of pulling out the first illuminator from the first opening and inserting the first illuminator into the body cavity through a third opening formed at a position different from the first and second openings. COAPTATION ULTRASOUND DEVICES AND METHODS OF USE 20230181151 · 2023-06-15 · University Of Maryland, Baltimore · Steven P. Tropello Disclosed is a system and method for the placement of elongate medical members within a patient’s body using coaptive ultrasound that combines magnetic guidance with ultrasound visualization of the medical member in the patient’s body. A coaptive ultrasound probe adaptor magnetically attracts an elongate medical member within the patient with sufficient force so as to allow the operator to manually guide the member to its intended location. The adaptor mates with an ultrasound probe to provide the medical operator ultrasound feedback of the position of the member, thus allowing internal placement without the need for more specialized medical equipment. ARTICULATED VIDEO PROBE WITH MAGNETIC STIMULATION 20170330665 · 2017-11-16 · Seyed Mostafa Zareei, Mahdi Barekatain Fard, Mohammad Hossein Kalbasi Ashtari A video probe is disclosed herein that includes an elongated probe including an articulating portion, and a controller functionally coupled with the elongated probe. The articulating portion may include at least two interconnected links and each link may include opposing electromagnetic coils disposed within the link. The controller may be configured to stimulate the opposing electromagnetic coils to attract/repulse corresponding opposing electromagnetic coils of an adjoining link thereby causing the link to pivot about the axis of the single-axis joint. Endoscope system, processor and endoscope 11259689 · 2022-03-01 · Olympus Corporation · Masanori Shimoyama An endoscope system includes an endoscope and a processor. The endoscope includes: an actuator including a coil configured to cause a movable lens and a magnet to move by application of a drive signal; a position sensor configured to output a position detection signal showing a position of the movable lens according to a magnetic flux of the magnet; and an endoscope memory storing correction information for correcting crosstalk onto the position detection signal by the magnetic flux of the coil. The processor includes a drive controller configured to correct the position detection signal based on the drive signal and the correction information and output the drive signal based on a target position and the corrected position detection signal, to the actuator. $