Abstract: In a robot-assisted steerable medical device, such as a catheter, a magnetic connector hub is configured to establish mechanical and magnetic connection between a drive cable and an actuator, or between multiple modules in a single insert-and-twist motion. The connector hub creates a magnetic breakaway feature for automatically decoupling the actuator from the drive cable, while the catheter remains attached. This prevents damage to the catheter/tool and/or patient when an excessive force is applied, and adds a safety element and helps protect the patient. And when the breakaway occurs the system can be automatically reengaged catheter without damage, so that normal operation can resume. Connection can also be broken at any point in the operation based on threshold forces or emergency situations.

Abstract: A method of controlling power delivered to a shape memory alloy, SMA, actuator wire arrangement, wherein the arrangement comprises a plurality of SMA actuator wires, comprising: the steps of: applying, at a PWM frequency, to each of the SMA actuator wires during respective active periods a succession of voltage pulses; and applying, during a resistance measurement period, to one of the plurality of SMA actuator wires a resistance measurement current pulse, wherein the resistance measurement period corresponds to the respective active period of one of the plurality of SMA actuator wires.

Abstract: An apparatus includes a handle, a catheter, extending distally from the handle, an end effector extending distally from the catheter, a deflection assembly, and a load limiting assembly. The deflection assembly is configured to deflect the end effector away from a longitudinal axis of the catheter. The deflection assembly includes an input member and a translating assembly. The input member is configured to drive the translating assembly to deflect the end effector away from the longitudinal axis. The load limiting assembly is configured to decouple the input member from the translating assembly at a predetermined load such that the input member is inhibited from driving the translating assembly when the input member is decoupled by the load limiting assembly.

Abstract: This invention relates to an endoscopic device, and more particularly but not exclusively to an endoscopic device suitable for use in diagnostic and/or surgical procedures. The endoscopic device includes a base and a shaft extending from the base. The shaft is at least partially flexible and includes a bending section that is selectively displaceable between a straight configuration and a bent configuration. The endoscopic device also includes an actuation arrangement for selectively displacing the bending section between the straight and bent positions. The actuation arrangement includes at least one actuator which is at least partially made from a shape memory alloy, and which is configured to displace the bending section of the shaft when electric current is passed therethrough. The actuator is located inside the base of the device.

Abstract: A shape measuring apparatus includes a cylindrical flexible body and a bend detection sensor. The sensor includes an optical fiber extending along the flexible body, a detection target to vary characteristics of detection light guided through the optical fiber in accordance with a curvature of the optical fiber, and a light detection unit to detect the detection light. The shape measuring apparatus also includes a shape calculating device to calculate a bend shape of the flexible body, based on the variation of the characteristics of the detection light, a cylindrical sheathing member sheathing a part of the optical fiber in the flexible body, and a hard distal member provided at a distal end of the flexible body and holding a distal end of the sheathing member.

Abstract: A variable-stiffness actuator includes a shape-memory member that increases in stiffness on heating, a heating member arranged to surround the shape-memory member along a longitudinal axis of the shape-memory member, and a heat transmitting medium arranged to surround the heating member along a longitudinal axis of the heating member. The heating member generates heat in response to supply of a current, so as to heat the shape-memory member. The heat transmitting medium is deformed to decrease an inner diameter of the heat transmitting medium to come into contact with the heating member, so as to cool the heating member. The heat transmitting medium is deformed to increase the inner diameter to come out of contact with the heating member.

Abstract: A flexible tube insertion apparatus including a flexible tube to be inserted into an insertion target is provided. The apparatus includes a variable stiffness section disposed in the tube and configured to change a bending stiffness of the tube, a variable stiffness drive section configured to drive the variable stiffness section, a rotation sensor configured to detect rotation of the tube about a central axis, and an insertion shape sensor configured to detect a curved shape of the tube. A variable stiffness controller drives the drive section so that a bending stiffness of the variable stiffness section is increased based on information detected by the rotation sensor and detected by the insertion shape sensor, when the tube forms a loop and rotates about the axis.

Abstract: An actuator device includes an actuator member, a drive subject, a first drive device and a second drive device. The actuator member is configured to be deformed in response to application of energy to the actuator member from an outside. The drive subject is coupled to the actuator member. The first drive device is configured to apply the energy to the actuator member and thereby displace the drive subject in a deforming direction of the actuator member. The second drive device is configured to displace the drive subject in a different direction that is different from the deforming direction of the actuator member.

Abstract: A flexible tube insertion apparatus includes a flexible tube to be inserted into an insertion target body, a variable stiffness portion that changes a bending stiffness of the flexible tube, a state detection sensor that detects state information of the flexible tube. The apparatus also includes a shape calculator that calculates shape information regarding a shape of the flexible tube based on the state information, an external force calculator that calculates external force information including magnitude of an external force received by the flexible tube based on the state information, and a stiffness controller that controls the variable stiffness portion in accordance with the shape information so that the magnitude of the external force received by the flexible tube becomes smaller than a reference value.

Abstract: An actuator that comprises a deformable material, an energy input part, and a characteristics change detection unit. The deformable material is configured with a polymer fiber and, by deforming in response to energy input from the outside, outputs motive power. The energy input part inputs energy to the deformable material. The characteristics change detection unit detects when the deformation characteristic of the deformable material has changed. The actuator also comprises a drive control unit that, by controlling the above-described energy, controls the output of the deformable material. When the characteristic change detection unit detects a change in the deformation characteristic, the drive control unit controls the energy in accordance with the change in the deformation characteristic.

Abstract: An insertion system includes an insertion apparatus including an insertion section, a fiber sensor configured to detect a bend shape of the insertion section, an attitude detector, and an attitude shape calculator. The attitude detector is configured to detect at least one of a first rotational change quantity related to a change quantity of rotation about a longitudinal direction of the insertion apparatus, and a first directional change quantity related to a change quantity of the longitudinal direction. The attitude shape calculator is configured to calculate attitude shape information including at least one of a change quantity of rotation of the bend shape and a change quantity of a direction of the bend shape, based on the bend shape and the at least one of the first rotational change quantity and first directional change quantity.

Abstract: The present invention relates, generally, to reporting the approximate three-dimensional orientation of the steerable distal portion of an endoscope to the user of the endoscope. More particularly, the present invention relates to a system and method for providing the endoscope-user a display from which to more easily determine the approximate three-dimensional orientation of the steerable distal portion of the endoscope, thereby facilitating navigation of the endoscope. The present invention also relates to a system and method for limiting the amount the steerable distal portion can bend overall to reduce or eliminate the user's ability to over-retroflex the steerable distal portion of the endoscope.

Abstract: An endoscope device includes: an insertion unit having segments continuously provided along an axial direction of the insertion unit and configured to be inserted into a lumen; a state quantity calculating unit configured to calculate a state quantity of each segment; variable rigidity portions provided for each segment to allow bending rigidity of each segment to be variable; an origin specifying unit configured to specify an origin segment among the segments in setting a segment range indicating which segment the bending rigidity is to be changed or in setting the bending rigidity, based on the state quantity of each segment; and an operation controller configured to: set the segment range or set the bending rigidity of each segment, based on the origin segment; and decrease bending rigidities of two or more continuously provided segments based on the set segment range or on the set bending rigidity.

Abstract: An apparatus may include a handle having a first portion and a second portion. The second portion may extend at an angle from the first portion. The handle may also include a passage configured to receive a medical device therethrough and defined by the first portion. Further, the handle may include an actuator operably coupled to the first portion. The apparatus may also include an endoscopic insertion device coupled to and extending distally of the first portion of the handle. Further, manipulation of the actuator may be configured to deflect a distal portion of the insertion device.

Abstract: The medical instrument a wire, a flexible sheath through which the wire is inserted, a wire driving unit for driving the wire, a passive unit that is put into operation as the wire is driven, a sheath pulling unit for pulling the sheath, a sheath lock unit for locking movement of the sheath, and a control unit for switching among a run-up mode in which the passive unit and the wire driving unit are still disconnected, a sheath free mode in which the sheath is not locked and so set free, a sheath slack adjustment mode in which a slack in the sheath is adjusted to lock the sheath in place and a master/slave mode in which the passive unit connected to the wire driving unit is put into a drivable state.

Abstract: The present invention provides a system and single or multi-functional element device that can be inserted and temporarily placed or implanted into a structure having a lumen or hollow space, such as a subject's abdominal cavity to provide therewith access to the site of interest in connection with minimally invasive surgical procedures. The insertable device may be configured such that the functional elements have various degrees of freedom of movement with respect to orienting the functional elements or elements to provide access to the site from multiple and different orientations/perspectives as the procedure dictates, e.g., to provide multiple selectable views of the site, and may provide a stereoscopic view of the site of interest.

Abstract: A system for graphically visualizing an orientation of a steerable distal portion of an elongate instrument is disclosed. The system includes an instrument having an elongate body. The elongate body includes a proximal portion and a steerable distal portion. The system also includes at least one tensioning member attached to said steerable distal portion, wherein the actuation of said at least one tensioning member results in an approximate y-bend and an approximate x-bend of said steerable distal portion, and wherein said approximate y-bend and approximate x-bend define an approximate overall bend of said steerable distal portion. The system further includes a graphical user interface and an icon representing said approximate overall bend on said graphical user interface.

Abstract: In a robotic endoscope system, the orientation of a captured camera view at a distal tip of a robotic endoscope and displayed on a screen viewable by an operator of the endoscope is automatically maintained at a roll orientation associated with a setpoint so as not to disorient the operator as the endoscope is moved, flexed and its tip turned in different orientations. A processor generates a current commanded state of the tip from operator input and modifies it to maintain the setpoint roll orientation. To generate the modified current commanded state, the current commanded roll position and velocity are constrained to be a modified current commanded roll position and velocity that have been modified according to a roll angular adjustment indicated by a prior process period commanded state of the tip and the setpoint. The processor then commands the robotic endoscope to be driven to the modified commanded state.

Abstract: Contact between a face to be pressed and a cam face in an interaxial direction T of two inner guide sheaths is set so that a contact width H therebetween is shorter than an interaxial distance L, and so that the contact position is located between axes of the two inner guide sheaths. As a result, even in a case where external diameters of two inner guide sheaths that form a pair are slightly different to each other, a braking member can be tilted to cause a contact face to simultaneously come in contact with the respective inner guide sheaths, and a pressing force from an eccentric cam can be transmitted equally to the respective inner guide sheaths.

Abstract: A control apparatus controls a bio-optical measurement apparatus which is configured to be inserted into a subject through an endoscopic device and is configured to perform an optical measurement of a biological tissue in the subject. The endoscopic device is configured to capture, by inserting a distal end part of the endoscopic device into the subject, in-vivo images of the subject by an imaging unit provided at the distal end part. The control apparatus includes a position determining unit configured to determine a position of the distal end part in the subject, and a permission signal outputting unit configured to output a permission signal for permitting the bio-optical measurement apparatus to perform the optical measurement based on a determination result by the position determining unit.

Abstract: An endoscopic system includes an insertion-section, a wire, an adjustment-unit, a memory, a shape-acquiring-unit and a controller. The insertion-section includes a tubular-section and a bending-section. The wire is inserted in the insertion-section and pulled and loosened to bend the bending-section. The adjustment-unit adjusts tensile force applied to the wire. The memory stores correspondent information including a relationship between increase/decrease information indicative of increase/decrease in the tensile force due to a shape of the tubular-section and shape information indicative of the shape of the tubular-section. The shape-acquiring-unit acquires the shape of the tubular-section.

Abstract: A medical probe includes an insertion tube, having a longitudinal axis and having a distal end. A distal tip is disposed at the distal end of the insertion tube and is configured to be brought into contact with a body tissue. A joint couples the distal tip to the distal end of the insertion tube. A joint sensor, contained within the probe, senses a position of the distal tip relative to the distal end of the insertion tube. The joint sensor includes first and second subassemblies, which are disposed within the probe on opposite, respective sides of the joint and each include one or more magnetic transducers.

Abstract: In an endoscopic system, when an affected area of a biomedical tissue in an image is treated with a scalpel and a holding pair of forceps which movably extend from a distal portion of an endoscope through the endoscope while the image taken by the endoscope in a body cavity in a time-series manner is being observed, a treatment is performed in which the holding pair of forceps holds the affected area detached from the biomedical tissue by the scalpel. When any motion is detected in the distal portion of the endoscope included in the image, a motion direction and a motion amount of the distal portion of the endoscope attributed to the motion are detected, and the distal portion of the endoscope is curved to return the scalpel to an original treatment position.

Abstract: A steerable endoscope has an elongated body with a selectively steerable distal portion and an automatically controlled proximal portion. The endoscope body is inserted into a patient and the selectively steerable distal portion is used to select a desired path within the patient's body. When the endoscope body is advanced, an electronic motion controller operates the automatically controlled proximal portion to assume the selected curve of the selectively steerable distal portion. Another desired path is selected with the selectively steerable distal portion and the endoscope body is advanced again. As the endoscope body is further advanced, the selected curves propagate proximally along the endoscope body, and when the endoscope body is withdrawn proximally, the selected curves propagate distally along the endoscope body. This creates a serpentine motion in the endoscope body allowing it to negotiate tortuous curves along a desired path through or around and between organs within the body.

Abstract: A medical probe includes a flexible insertion tube, having a distal end for insertion into a body cavity of a patient, and a distal tip, which is disposed at the distal end of the insertion tube and is configured to be brought into contact with tissue in the body cavity. A coupling member couples the distal tip to the distal end of the insertion tube and includes a tubular piece of an elastic material having a helical cut therethrough along a portion of a length of the piece.

Abstract: An endoscope insertion shape observation probe including: a bobbin including a first insulation member provided at a front end of a core made of a magnetic member and a second insulation member provided at a rear end of the core; a coil portion formed by winding metal lines on the core; at least two terminal portions to which the metal lines are electrically connected; and signal lines having wires electrically connected to the terminal portions and extended rearward while being sandwiched between an inner circumferential surface of a tube and an outer circumferential portion of the coil portion, wherein the two terminal portions has the wires brazed respectively on surface sides thereof, the surface sides being directed in opposite directions away from each other toward outward of each magnetic coil unit, which improves resistance property of signal lines connected to plural magnetic coil units without increasing an outer diameter.

Abstract: A medical probe includes a flexible insertion tube, having a distal end for insertion into a body cavity of a patient, and a distal tip, which is disposed at the distal end of the insertion tube and is configured to be brought into contact with tissue in the body cavity. A resilient member couples the distal tip to the distal end of the insertion tube and is configured to deform in response to pressure exerted on the distal tip when the distal tip engages the tissue. A position sensor within the probe senses a position of the distal tip relative to the distal end of the insertion tube, which changes in response to deformation of the resilient member.

Abstract: An apparatus and a computer-implemented method are provided for determining a location in a target image (T) of a site on a surface of a physical object using two or more reference images (I1, I2) of said physical object that have been obtained with a reference imaging device. Each of said two or more reference images includes said site on the surface of the physical object and was obtained with the reference imaging device having a different position and/or orientation relative to said physical object. The target image is obtained by a target imaging device and includes the site on the surface of the physical object. For each reference image, a set of feature mappings from the reference image to the target image is used to determine the epipolar geometry between the reference image and the target image, and a projection of the site from the reference image onto the target image is calculated from said epipolar geometry.

Abstract: An elongate robotic arm comprising articulated segments and a channel that extends along the longitudinal axis of the arm and contains a stiffening member which includes a sensor for measuring the shape of the arm. Using the central channel for this purpose improves the ease and accuracy of shape measurement.

Abstract: In the present invention, a logical block of an FPGA is configured by a serial communication unit, a serial communication control portion, an EEPROM controller, an abnormal signal processing portion, an LED controller, an operation mode controller, a DPRAM, a clutch signal input portion, a jig substrate input output portion, a RAM, a motor controller, a motor drive waveform generating portion, an RL (right and left) motor current F/B portion, a UD (up and down) motor current F/B portion, a potentiometer control portion, a thermistor control portion, an RL encoder control portion, a UD encoder control portion, and an FPGA block abnormality monitoring portion.

Abstract: A shank for a flexible endoscope or a flexible endoscopic instrument includes a first shank portion and, arranged in the distal direction from the first shank portion, a second shank portion, wherein the second shank portion can be angled relative to a distal end area of the first shank portion by a longitudinal adjustment of at least one tensioning means extending inside the second shank portion, and wherein at least one cord drive is provided for the longitudinal adjustment of the tensioning means. In this way, a shank for a flexible endoscope or a flexible endoscopic instrument is created which is of simple and robust construction and which can be produced inexpensively. The invention also relates to a flexible endoscope and a flexible endoscopic instrument.

Abstract: When an operation instruction is input by a first (second) control output instruction input device, locus calculation means calculates a locus of movement of a first (second) therapeutic device on the basis of any one of joint sections, which is instructed to operate. On the basis of a calculation result by the locus calculation means, therapeutic device operation control means controls an operation of the first (second) therapeutic device by a first (second) active mechanism. Thereby, there is provided an endoscope apparatus which can improve the operational efficiency and positional precision of the therapeutic device.

Abstract: A medical instrument, includes: an insertion section having a treatment instrument projection port and an active bending section at a position on the insertion section's proximal end portion side of the treatment instrument projection port; a joystick by which an operation of the active bending section is inputted; a driving section for driving the active bending section; and a control section for controlling the joystick and the driving section, and the control section having an active bending section which performs a control in one control mode selected from a plurality of different control modes.

Abstract: An endoscopic form detection device includes a posture detecting section configured to detect a posture of each of sensor units based on measurement data in the sensor unit, and a linear form detecting section configured to detect a detected linear form of an inserting section on an assumption that a form between the respective sensor units is a linear link whose dimension is equal to an inter-sensor dimension based on the detected posture of each of the sensor units. The endoscopic form detection device includes a form correcting section configured to compensate at least a position of each of the sensor units by using a particle filter, and configured to detect a corrected form obtained by correcting the detected linear form.

Abstract: Waypoints for a steerable medical device are stored as the steerable medical device is moved within a patient. The stored waypoints are an ordered sequence of locations. The ordered sequence of locations defines a safe path within the patient for moving an articulatable portion of the steerable medical device. The articulatable portion of the steerable medical device is constrained to follow the safe path as the articulatable portion moves within the patient. For example, the articulatable portion of the steerable medical device is constrained to remain within a boundary region enclosing the safe path as the articulatable portion of the steerable medical device follows the safe path.

Abstract: The present invention relates, generally, to reporting the approximate three-dimensional orientation of the steerable distal portion of an endoscope to the user of the endoscope. More particularly, the present invention relates to a system and method for providing the endoscope-user a display from which to more easily determine the approximate three-dimensional orientation of the steerable distal portion of the endoscope, thereby facilitating navigation of the endoscope. The present invention also relates to a system and method for limiting the amount the steerable distal portion can bend overall to reduce or eliminate the user's ability to over-retroflex the steerable distal portion of the endoscope.

Abstract: A medical apparatus system includes: an image generating section that generates an image in an observation field of view obtained from an observing section including an objective lens; an information collecting section that collects information of a treatment instrument; a distortion setting section that sets virtual distortion on the outside of the observation field of view from a characteristic of distortion of the objective lens; a distorted image generating section that generates a distorted image on the outside of the observation field of view with respect to the treatment instrument; and an image combining section that generates a combined image such that an image of the treatment instrument on the inside of the observation field of view and a distorted image of the treatment instrument coincide with each other in a boundary of the observation field of view.

Abstract: A rotational force transmission mechanism has: a rotation-inputting member freely rotative and driven in a predetermined first direction and a second direction opposite the first direction by a predetermined operating member; a first rotation-transmitting member for receiving a rotational driving force supplied from the rotation-inputting member in the first direction; a second rotation-transmitting member, disposed to face the first rotation-transmitting member, for receiving a rotational driving force supplied from the rotation-inputting member in the second direction; a connection section disposed so that the rotational force acts in the direction in which the first rotation-transmitting member and the second rotation-transmitting member face each other, the connection section in the facing position transfers the rotational driving force received by the first rotation-transmitting member in the first direction to the second rotation-transmitting member and transfers the rotational driving force received by

Abstract: An endoscope shape analysis apparatus includes a coordinates obtaining portion for obtaining coordinate values of an insertion portion; a storage portion for storing the coordinate values; a straight line setting portion for setting a first straight line A and a second straight line B, based on the coordinate values; a coordinate transformation portion for transforming coordinates of a previous second straight line B1, based on a positional relationship between a previous first straight line A1 and the first straight line A, to calculate a third straight line B2; a determination portion for determining whether there is an error in a position display from a positional relationship between the first straight line A, the second straight line B, and the third straight line B2; and a correction portion for correcting the second straight line B.

Abstract: A medical probe includes an insertion tube, having a longitudinal axis and having a distal end. A distal tip is disposed at the distal end of the insertion tube and is configured to be brought into contact with a body tissue. A joint couples the distal tip to the distal end of the insertion tube. A joint sensor, contained within the probe, senses a position of the distal tip relative to the distal end of the insertion tube. The joint sensor includes first and second subassemblies, which are disposed within the probe on opposite, respective sides of the joint and each include one or more magnetic transducers.

Abstract: The endoscope is equipped with: a curving manipulation unit provided on the main body manipulating unit, for performing a manual operation which causes the curving portion; a curving drive unit for coupling the curving manipulation unit to the curving portion so as to curve the curving portion in response to a manipulation performed by the curving manipulation unit; a manipulating force detecting unit for detecting a manipulating force applied to the curving manipulation unit; a manipulation assisting power calculating unit for calculating manipulation assisting power corresponding to the manipulating force detected by the manipulating force detecting unit; and a rotation driving force generating unit for applying a driving force via a driving force transferring mechanism to the curving drive unit, so as to generate the manipulation assisting power calculated by the manipulation assisting power calculating unit; in which the rotation driving force generating unit is arranged in an appendix unit.

Abstract: A controller includes a servo controller that performs attitude control of the bending portion. A point lock computing section is provided at the servo controller. Based on supplied distal end command value information and position feedback information, the point lock computing section performs computational processing by a distal end link root coordinate position calculating section and an inverse kinematics computing section in order to obtain a servo position command signal for a distal end-side link member and a servo position command signal for a link member other than the link member, and outputs the same to a driving section. Accordingly, point lock is enabled at two locations, namely, the distal end-side link member and an arbitrary link member, while other link members are controlled so as to assume attitudes having redundancy.

Abstract: In a medical control system, when motors are in a stopped state according to the determination based on an amount of change in an instruction value, the disturbance characteristics is set at high sensitivity in order to keep the detection capability of a disturbance observer section in an enhanced state during a period to the drive start time of the motors, and when the motors are brought into an operating state, a gain of a controller is returned to a normal setting value to maintain the excellent follow-up characteristics.

Abstract: An attachment and detachment mechanism includes convex and concave engaging portions provided in first and second couplings respectively and extending in a radial direction of first and second shaft portions, the convex engaging portion is to be slidably inserted into and removed from the concave engaging portion along a longitudinal direction of the concave engaging portion, the convex and concave engaging portions includes basic positions where the longitudinal directions of the convex and concave engaging portions correspond to the attachment and detachment direction of the first and second main body portions and the convex and concave engaging portions are insertable into and removable from each other, and the attachment and detachment mechanism further includes a guide mechanism to guide one engaging portion such that the one engaging portion is disposed at the basic position in conjunction with the attachment or detachment of the first and second main body portions.

Abstract: An endoscope apparatus includes: an insertion portion including a bending portion provided on a distal end side thereof; a bending drive section that drives bending of the bending portion; an insertion shape detection section that detects an insertion shape of the distal end side of the insertion portion as insertion shape information; a curved state detection section that detects a curved state based on the insertion shape information as curve information; a plane calculation section that performs a calculation to estimate a plane for driving bending of the bending portion from the detected curve information; and a bending control section that drives bending of the bending drive section along the estimated plane.

Abstract: An endoscope apparatus includes an insertion portion to be inserted into a subject, a bendable bending portion provided in a distal end side of the insertion portion, a bending driving section that drives the bending of the bending portion, and a bending driving control section that controls the bending driving section based on an inputted control signal to cause a distal end of the bending portion to make a turning motion with respect to a proximal end thereof.

Abstract: An endoscopic device including mechanisms to facilitate insertion of the device is disclosed. The device includes a sensing assembly configured for determining the position of the distal end of the device relative to a lumen. The device may further including a steering mechanism configured to direct the distal end of the device. A controller may be operably connected to the sensing assembly and the steering mechanism. The controller may be incorporated into the endoscopic device. Alternately, the controller may be positioned remote of the endoscopic device.

Abstract: A medical probe includes a flexible insertion tube, having a distal end for insertion into a body cavity of a patient, and a distal tip, which is disposed at the distal end of the insertion tube and is configured to be brought into contact with tissue in the body cavity. A coupling member couples the distal tip to the distal end of the insertion tube and includes a tubular piece of an elastic material having a helical cut therethrough along a portion of a length of the piece.

Abstract: An endoscopic form detection device includes a posture detecting section configured to detect a posture of each of sensor units based on measurement data in the sensor unit, and a linear form detecting section configured to detect a detected linear form of an inserting section on an assumption that a form between the respective sensor units is a linear link whose dimension is equal to an inter-sensor dimension based on the detected posture of each of the sensor units. The endoscopic form detection device includes a curve form detecting section configured to perform curve interpolation with respect to the detected linear form detected on an assumption that a form between the respective sensor units is an arc whose arc length is equal to the inter-sensor dimension, and configured to detect a detected curve form.

Abstract: An endoscopic form detection device includes a sensor tentative position detecting section configured to detect a tentative position of each sensor unit on the assumption that a portion between the respective sensor units is a linear tentative link whose dimension is equal to an inter-sensor dimension. The endoscopic form detection device includes a sensor position correcting section configured to correct a position of each sensor unit from the tentative position to a final position based on an absolute value of a difference between an arc length of each tentative arc and the inter-sensor dimension, and a final curve form detecting section configured to perform curve interpolation between the final positions of the respective sensor units by using a final arc to detect a final curve form of an inserting section.