Abstract: A measurement probe for preschoolers includes a fiber configured to irradiate a head of a subject with light, and a holder made of a metal or resin other than rubber. A tip surface of a tip of the fiber that contacts the head of the subject is flat, and a corner of a tip surface of the holder that contacts the head of the subject is chamfered.

Abstract: A sensor device includes a housing defining a cavity, an inlet to receive fluid pumped from an instrument device, an outlet to return the fluid to a fluid reservoir, and a fluid channel defined inside the cavity between the inlet and the outlet. A heat pump is mounted inside the cavity, and has a side surface thermally coupled to the fluid channel and an opposite side surface thermally coupled to a plate. The heat pump is configured to induce a temperature change. A sensor unit is aligned with an aperture in the plate and includes an optical component and a thermal component. The optical component configured to measure a vascular endothelial response from the induced temperature change.

Abstract: The present invention relates to a device and method for skin gloss detection. To enable skin gloss detection in a simple and efficient manner, preferably with an available user device, the device comprises an illumination unit (2) for illuminating a skin area at a flashing rate, an imaging unit (3) for acquiring images of the skin area at an imaging rate which is different than said flashing rate, and a processing unit (4) for processing acquired images and detecting the amount of gloss in the skin area from at least one partial image of the skin area while being illuminated by said illumination unit and at least one partial image of the skin area while not being illuminated by said illumination unit.

Abstract: According to an aspect, there is provided a computer-implemented method for assessing muscle fatigue in at least one muscle of a subject.

Abstract: Systems and methods for sonifying electrical signals obtained from a living subject, particularly EEG signals, are disclosed. A time-domain signal representing the activity of an organ is obtained. A voltage of the time-domain signal over a time block is determined. An acoustic signal based on the time-domain signal over the time block is produced. The acoustic signal comprises one or more audibly discernible variations representative of the activity of the organ. If the determined voltage is over a threshold voltage, the time-domain signal is squelched over at least a portion of the time-block as the acoustic signal is produced. The time-domain signal can be squelched by ramping down the signal as an input to produce the acoustic signal. The frequency spectrum of the acoustic signal can also be adjusted as it is produced, such as by flattening the signal and/or attenuating high frequencies along the frequency spectrum of the signal.

Abstract: Computer-implemented systems and methods for sleep optimization are disclosed. In certain embodiments, the system includes one or more peripheral devices, a network, one or more networked computers, and one or more remote servers. The peripheral devices and/or the networked computers collect one or more types of sleep data, calculate one or more sleep parameters, and transmit said sleep parameters to the one or more remote servers. The remote servers then perform calculations to determine optimal sleep recommendations. The sleep recommendations are then output to one or more networked computers and/or one or more peripheral devices as adjustments to sleep time and sleep duration.

Abstract: Systems and methods are provided for adjusting a standing insulin medicament dosage regimen for a subject. Fasting events are Device for adjusting a standing insulin regimen identified using autonomous timestamped glucose measurements of the subject in a first data set. A second data set, from one or more insulin pens used to apply the standing regimen, comprises records, each record comprising a timestamped event specifying an amount of injected insulin medicament. Each fasting event is characterized as adherent or nonadherent. A fasting event is adherent when the second data set includes one or more records that temporally and quantitatively establish adherence with the standing regimen during the fasting event. Conversely, a fasting event is nonadherent when the second data set fails to temporally and quantitatively establish adherence with the standing regimen.

Abstract: A method of determining a state of progression in a subject of a disease or treatment having motion symptom comprises obtaining a time series of motion data from a motion detector worn on an extremity of the subject, over an extended period during usual activities of the subject; processing the motion data to produce a plurality of measures of kinetic state of the subject at a respective plurality of times throughout the extended period, each measure of kinetic state comprising at least one of: a measure for bradykinesia, and a measure for dyskinesia; determining a measure of dispersion of the measures of kinetic state; combining the measure of dispersion with at least one other data characteristic determined from the motion data, to produce a selection score; and generating an output indicating the selection score.

Abstract: A CPU of a health management apparatus functions as an acquisition unit, a first derivation unit, and a screen output control unit. The acquisition unit acquires a body-fat percentage which is an obesity parameter indicating the degree of obesity of a target pet and bone density which is a bone parameter indicating the degree of bone strength of the target pet. The first derivation unit derives health conditions of the target pet on the basis of a correlation between the body-fat percentage and the bone density. A screen output control unit performs control to output a medical examination result display screen on which the health conditions are displayed.

Abstract: A computer-implemented method for indicating a long-term stress level of a person by means of a data processing unit, including the steps of acquiring stressor data having a set of stressor data items; analyzing stressor data values of the stressor data items by means of an artificial neural network to generate data representing a stress level, wherein the artificial neural network (ANN) is trained to provide output representing the stress level based on the stressor data values and an indication of previous stress state; and signaling the stress level.

Abstract: There is provided a wearable device operable to determine an orientation of the wearable device, when placed on a body. The wearable device comprises a plurality of electrode pairs located at different positions. At least two of the plurality of electrode pairs are configured to receive a signal transmitted from a reference device using the body as a transmission medium. The wearable device also comprises a processor configured to determine a property associated with the signal received at the at least two electrode pairs, compare the determined property to a corresponding reference property and determine, from the comparison, whether the wearable device is in the predetermined orientation on the body. The determined property is indicative of an orientation of the wearable device with respect to the reference device and the corresponding reference property is indicative of a predetermined orientation for the wearable device on the body.

Abstract: A self-heating belly band for wrapping around an infant is provided. The belly band includes a multi-layer fabric construction that captures the infant's body heat and then reuses it to warm the infant's stomach and internal organs thereby providing the infant relief. The belly band also provides pressure on the infant's waist to provide the infant a cuddling, soothing, and comfort feel. Hook and loop fastener strips on top and bottom layers of the belly band allow wrapping and tightness adjustment around the infant's stomach. The belly band also includes a plurality of monitoring system that allows medical monitoring of the baby's vital signs. The monitoring system uses ultrasonic sound or infrared light to alert a user when the baby's vital sign increases or decrease from a preselected threshold. The monitor, along with sensors is used to measure blood pressure, heartbeat, temperature, oxygen level, as well as movement.

Abstract: An integrated window for a photosensor for use in an electronic device has first and second transparent regions separated by an opaque region. The first transparent region allows a transmitter to emit light out of the housing of the electronic device and the second transparent region allows a receiver to receive light through the housing. The opaque region is disposed between the first and second transparent regions to isolate them from one another such that the transmitted light is isolated from the received light.

Abstract: A method for placing electrodes on a patient uses a mobile device with built-in camera to generate a customized, virtual electrode template for neurological monitoring. The camera captures a digital image of the patient and is programmed to find landmarks, use analysis, and respond to manual input for electrode locations and generate a virtual electrode template. Facial recognition and edge detection software determines the outline of the patient's head when in the field of view of the camera monitor. The user then may assist the camera in identifying landmarks on the patient's head, such as the nasion, the inion, and the pre-auricular points, to facilitate generation of the virtual electrode template on the image in the camera's viewfinder, which template moves and rotates with the patient. The virtual electrode template guides the user in establishing a set of electrodes on the patient's head for neurological monitoring.

Abstract: A microrobot configured to move in a viscous material, in particular in an organ of a subject such as a brain, the microrobot having a propulsion structure including a head portion, a rear portion and a deformable portion connecting the head portion and the rear portion. The deformable portion is deformable in elongation/contraction along a main axis connecting the head portion and the rear portion. The head portion includes at its surface at least one propulsion cilium, one end of the at least one propulsion cilium being attached to the head portion and the other end of the at least one propulsion cilium being a free end configured to move freely in the viscous material. The propulsion structure further comprises a motor configured to actuate sequentially elongation/contraction cycles of the deformable portion.

Abstract: Computer-implemented methods are disclosed for assessing the effect of musculoskeletal activities on disease and/or clinical events, the method comprising: receiving a patient-specific vascular and musculoskeletal model of a patient's anatomy, including at least one vessel of the patient; receiving at least one characteristic of the patient's musculoskeletal activity; generating or updating a computational anatomic vascular and musculoskeletal model of the patient's anatomy based on the received at least one characteristic of musculoskeletal activity; performing at least one of a computational fluid dynamics analysis or a structural mechanics simulation on the computational anatomic vascular and musculoskeletal model; and estimating at least one of the patient's risk of disease or clinical events based on the performed computational fluid dynamics analysis and/or structural mechanics simulation. Systems and computer readable media for executing these methods are also disclosed.

Abstract: A biological information processing apparatus according to an embodiment of the present technology is provided with a sphygmographic sensor unit, a plurality of calculation units, and an output unit. The sphygmographic sensor unit outputs a pulse wave signal. The plurality of calculation units respectively calculate heart rate candidate information with a reliability on a basis of the output pulse wave signal. The output unit outputs heart rate information on a basis of the heart rate candidate information and the reliability thereof calculated by each of the plurality of calculation units.

Abstract: An artificial intelligence self-learning-based automatic electrocardiography analysis method and apparatus, the method comprising data preprocessing, heartbeat feature detection, interference signal detection and heartbeat classification based on deep learning, signal quality evaluation and lead combination, heartbeat verification, analysis and calculation of electrocardiography events and parameters, and finally automatic output of reporting data, realizing an automated analysis method having a complete and rapid flow. The automatic electrocardiography analysis method may also record modification information of an automatic analysis result, collect modified data, and feed same back to the depth learning model to continue training, thereby continuously making improvements and improving the accuracy of the automatic analysis method.

Abstract: Conventionally, a neuronal controller located inside the central nervous system governing the maintenance of the upright posture of the human body is designed from a control system perspective using proportional-integral-derivative (PID) controllers, wherein human postural sway is modeled either along a sagittal plan or along a frontal plane separately resulting in limited insights on intricacies of a governing neuronal controller. Also, existing neuronal controllers using a reinforcement learning (RL) paradigm are based on complex actor-critic on-policy algorithms. Analyzing human postural sway is critical to detect markers for progression of balance impairments. The present disclosure facilitates modelling the neuronal controller using a simplified RL algorithm, capable of producing postural sway characteristics in both sagittal and frontal plane together.

Abstract: The present subject matter discloses a system(s) and a method(s) for determining a health state of an individual. According to an embodiment, a method comprises measuring, by a heart rate sensor, a heart rate of the individual during operation within the environment. The method further comprises outputting, by a pressure sensing platform, pressure data of the individual. Further, the method comprises outputting, by an image capturing device, image data of the individual. The method further comprises inferring, by a processing unit, an amount of fat of the individual in the image data. The method further comprises updating, by the processing unit, the amount of fat of the individual using the pressure data. The method further comprises controlling, by the processing unit, a threshold for determining the health state of the individual, using the amount of fat and the heart rate of the individual.

Abstract: Techniques are provided for adapting the display of patient data based on display screen-real estate and patient monitoring context. In one or more embodiment, a method is provided that comprises determining, by a system comprising a processor, relative priority of subsets of patient data based on patient and medical provider context, and determining, by the system, an arrangement and sizing scheme for displaying the patient data that maximizes usage of available display screen real-estate based on the relative priority of the subsets. The method further comprises displaying, by the system, the patient data on the available display screen real-estate in accordance with the arrangement and sizing scheme.

Abstract: Embodiments described herein relate to an analyte monitoring device having a user interface with a display and a plurality of actuators. The display is configured to render a plurality of display screens, including a home screen and an alert screen. The home screen is divided into a plurality of simultaneously displayed panels, with a first panel displays a rate of change of continuously monitored analyte levels in interstitial fluid, a second panel simultaneously displays a current analyte level and an analyte trend indicator, and a third panel displays status information of a plurality of components of the device. When an alarm condition is detected, the display renders the alert screen in place of the home screen, the alert screen displaying information corresponding to the detected alarm condition. Furthermore, the actuators are configured to affect further output of the analyte monitoring device corresponding to the detected condition.

Abstract: Systems and methods for providing sensitive and specific alarms indicative of glycemic condition are provided herein. In an embodiment, a method of processing sensor data by a continuous analyte sensor includes: evaluating sensor data using a first function to determine whether a real time glucose value meets a first threshold; evaluating sensor data using a second function to determine whether a predicted glucose value meets a second threshold; activating a hypoglycemic indicator if either the first threshold is met or if the second threshold is predicted to be met; and providing an output based on the activated hypoglycemic indicator.

Abstract: A system is provided for integrating at least one portable computing device with a resuscitative medical device such as a defibrillator. The system may include a carrying case coupled to the resuscitative medical device. The carrying case may include a storage space for the at least one portable computing device and a wireless charging system for charging the at least one portable computing device. The system may be configured to enable secure data transfer between each of the devices, including data communication and data storage. A processor of the resuscitative medical device may be configured to activate the wireless charging system and charge the at least one portable computing device under certain circumstances. The processor may further be configured to prioritize or optimize charging and data transfer between the resuscitative medical device and each of multiple portable computing devices.

Abstract: A method and apparatuses are provided that use a neural network to correct artifacts in computed tomography (CT) images, especially cone-beam CT (CBCT) artifacts. The neural network is trained using a training dataset of artifact-minimized images paired with respective artifact-exhibiting images. In some embodiments, the artifact-minimized images are acquired using a small cone angle for the X-ray beam, and the artifact-exhibiting images are acquired either by forwarding projecting the artifact-minimized images using a large-cone-angle CBCT configuration or by performing a CBCT scan. In some embodiments, the network is a 2D convolutional neural network, and an artifact-exhibiting image is applied to the neural network as 2D slices taken for the coronal and/or sagittal views. Then the 2D image results from the neural network are reassembled as a 3D imaging having reduced imaging artifacts.

Abstract: An image acquisition apparatus includes: a positioner controller communicatively coupled to a positioner, wherein the positioner controller is configured to generate a control signal to cause the positioner to rectilinearly translate a patient support relative to an imager, and/or to rectilinearly translate the imager relative to the patient support; an imaging controller configured to operate the imager to generate a first plurality of two-dimensional images for a patient while the patient is supported by the patient support, and while the positioner rectilinearly translates the patient support and/or the imager; and an image processing unit configured to obtain the first plurality of two-dimensional images and arrange the two-dimensional images relative to each other to obtain a first composite image.

Abstract: A system and method for automated localization, enumeration, and diagnoses of a tooth/condition. The system detects a condition for at least one defined localized and enumerated tooth structure within a cropped image from a full mouth series based on any one of a pixel-level prediction, wherein said condition is detected by at least one of detecting or segmenting a condition on at least one of the enumerated tooth structures within the cropped image by a 2-D R-CNN.

Abstract: Embodiments provide a stationary X-ray source for a multisource X-ray imaging system for tomographic imaging. The stationary X-ray source includes an array of thermionic cathodes and, in most embodiments a rotating anode. The anode rotates about a rotation axis, however the anode is stationary in the horizontal or vertical dimensions (e.g. about axes perpendicular to the rotation axis). The elimination of mechanical motion improves the image quality by elimination of mechanical vibration and source motion; simplifies system design that reduces system size and cost; increases angular coverage with no increase in scan time; and results in short scan times to, in medical some medical imaging applications, reduce patient-motion-induced blurring.

Abstract: The present invention relates to a method, and a corresponding device, for testing a radius of curvature and/or for detecting inhomogeneities of a curved X-ray grating for a grating-based X-ray imaging device. The method comprises generating a beam of light diverging from a source point, propagating along a main optical axis and having a line-shaped beam profile. The method comprises reflecting the beam off a concave reflective surface of the grating. A principal axis of the concave reflective surface coincides with the main optical axis and the source point is at a predetermined distance from a point where the main optical axis intersects the concave reflective surface.

Abstract: A PET imaging device for observing a brain includes a hollow three-dimensional structure with a shape capable of housing a head. The PET imaging device comprising multiple independent gamma ray detection modules that together form a structure capable of surrounding the head, said detection modules comprise continuous scintillation crystal blocks, wherein “continuous” means that the crystal blocks can be continuous in one or in two directions, each of the continuous scintillation crystal blocks has a polygonal main cross-section, and said structure is an elongated structure having a major axis in a direction corresponding to the front-nape direction and a shorter axis in a direction corresponding to a straight line joining ears on the head. The continuous scintillation crystal blocks are positioned adjacent to fit laterally in an exact manner with each other throughout their entire thickness, building a mosaic, without gaps between adjacent crystal blocks and without overlapping each other.

Abstract: Systems and methods that directly image attenuation-based object grid, use a source grid to improve imaging of the object grid using a high-energy polychromatic source, and use a detector grid having gratings oriented substantially orthogonally to that of the object grid, can address artifacts and beam hardening effects that limit the quality and discriminatory power of high-energy x-ray imaging that includes phase contrast.

Abstract: An X-ray imaging apparatus includes a table, an imager configured to capture a plurality of X-ray images, a rotating mechanism, a moving mechanism, and an image processor. The image processor is configured to generate a long image by performing processing of varying magnifications of the plurality of X-ray images based on an amount of relative movement of the table and the imager and splicing the plurality of X-ray images when imaging is performed at a plurality of imaging positions in a state in which an optical axis of X-rays radiated from an X-ray irradiator is inclined with respect to the table.

Abstract: A display system includes a hardware processor and a display that has a display screen and presents a display on the display screen on the basis of control exerted by the hardware processor. In a case of causing a thumbnail related to consecutive images sequentially acquired using X-rays at a plurality of different times to be displayed on the display screen, the hardware processor selects, as the thumbnail, an image in accordance with a setting previously determined for the consecutive images. An image other than a leading image of the consecutive images is included in the thumbnail.

Abstract: The disclosure relates to devices, systems, and methods for controlling acquisition parameters when carrying out a medical x-ray examination, wherein the device includes a lever.

Abstract: One embodiment relates to a method for providing image data of a hollow organ. The method includes applying a first contrast agent to a lumen of the hollow organ, to obtain a contrast agent filling of the lumen; applying a second contrast agent to a blood vessel system, the blood vessel system supplying a wall of the hollow organ, the second contrast agent having a different absorption spectrum than the first contrast agent; generating spectrally resolved computed tomography data of an examination area, the examination area including the hollow organ; calculating first image data indicative of a presence of the first contrast agent and second image data indicative of a presence of the second contrast agent by applying a material separation algorithm onto the spectrally resolved computed tomography data; and providing the image data of the hollow organ including the first image data and the second image data.

Abstract: In a case in which an imaging mode continuously acquiring a plurality of energy subtraction images is performed, a radiation source control unit of a control device performs radiation source control for performing a one-shot imaging operation, in which only one of first radiation and second radiation is emitted, at least once for one two-shot imaging operation in which the first radiation and the second radiation are continuously emitted. In a case in which the imaging mode is performed, a detector control unit performs detector control to direct a radiation detector to output a first radiographic image based on the first radiation and a second radiographic image based on the second radiation.

Abstract: An acquisition unit of a console acquires a first radiographic image and a second radiographic image. The first radiographic image and the second radiographic image are radiographic images which are output from a radiation detector by directing a radiation source to emit first radiation and second radiation in order to perform a moving image capture mode that continuously acquires a radiographic image required for the display of a moving image according to a preset frame interval. A receiving unit receives a request signal to request the generation of an energy subtraction image referred to for diagnosis. A generation unit generates the energy subtraction image in a case in which the receiving unit receives the request signal.

Abstract: A radiation image processing apparatus includes an image processing unit. The image processing unit is configured to superimpose a similar fluoroscopic image on a reference fluoroscopic image so as to create a device emphasis image in which a stent introduced into a subject is imaged in an emphasized state.

Abstract: A medical apparatus, particularly suitable for the treatment of a breast cancer, which apparatus has: a support for a patient, such as to expose a breast in a predetermined position of the support; an imaging unit, configured in such a way as to provide, in use, a 3D image of the breast; a treatment unit, having delivery means of a ionizing radiation beam and configured so as to provide, in use, the beam at the breast; a control unit of the imaging unit and/or treatment unit, configured to determine the delivery of a radiation beam with a shape dependent upon the image of the target body district supplied by the imaging unit.

Abstract: An abnormal site detection unit detects an abnormal site included in a medical image acquired based on radiation transmitted through a subject. A position specifying unit generates positional information for specifying a position of the abnormal site based on a feature point of the subject included in the medical image in a case where the abnormal site is detected in the medical image. An information generation unit generates additional imaging instruction information, including information that indicates a type of additional imaging based on the abnormal site and information that indicates the position of the abnormal site based on the positional information, for instructing at least one additional imaging.

Abstract: Techniques are provided for reconstructing cardiac frequency phenomena from a sequence of angiographic images, i.e., two-dimensional projection images acquired at faster than cardiac rate (greater than two-fold), and analyzed to provide a spatiotemporal reconstruction of moving vascular pulse waves according to that projection. In aspects, a cardiac frequency bandpass filter and/or a Eulerian magnification may be applied to the angiographic data to output the spatiotemporal reconstruction of cardiac frequency angiographic phenomena.

Abstract: A radiation image capturing apparatus is provided. The apparatus comprises an image capturing unit configured to acquire a radiation image, the image capturing unit being provided with a plurality of receptor fields for acquiring irradiation information of radiation concerning an integrated dose of radiation entering during irradiation with radiation, and a selection unit configured to select a receptor field, of the plurality of receptor fields, which is used by a user. The selection unit changes an upper limit of the number of receptor fields, of the plurality of receptor fields, which are used for one image capturing operation depending on when the radiation image capturing apparatus is attached to a stand to which the radiation image capturing apparatus can be attached and when the radiation image capturing apparatus is detached from the stand.

Abstract: A method for mitigating parallax for component reels being x-ray inspected, containing an x-ray inspection system and a plurality of reels circularly arranged in a conical field of view of an x-ray source of the x-ray inspection system, wherein a reels' inner edge is disposed higher than a reels' outer edge, wherein a plane of a reel is substantially parallel to a ray distances from the x-ray source.

Abstract: A method and device for acquiring a radiological image of at least part of a patient placed in a gantry. The method includes emitting radiation from a source that passes through the at least part of the patient and receiving the radiation at a detector. In one embodiment the detector may include a single flat panel sensor having a radiation sensitive surface and operable in at least a flat panel mode and a linear sensor mode. The method also rotating the source and the detector around at least a part of the patient and moving the detector along guides of a panel motion system along an axis perpendicular to the central axis of propagation. Also, the method includes translating the source and the detector in a direction of movement substantially perpendicular to the central axis of propagation.

Abstract: An image acquisition unit acquires a radiographic image set including a plurality of radiographic images, which have been generated by alternately irradiating a subject with radiation emitted from a plurality of radiation sources provided at different positions and alternately detecting the radiation transmitted through the subject using one detection unit, at a predetermined time interval. A feature point detection unit detects at least one common feature point in the subject from each of the plurality of radiographic images included in the radiographic image set. A positional information derivation unit derives three-dimensional positional information of the at least one feature point in the subject using a positional relationship between a position of the at least one feature point detected from each of the plurality of radiographic images on a detection surface of the detection unit and positions of the plurality of radiation sources.

Abstract: A method for improving the accuracy of a digital medical model of a part of a patient, the method includes obtaining a set of at least 2 medical images of the patient, where an element including a predefined geometry and/or predefined information was attached to the patient during the recording of the medical images; obtaining at least 2 tracking images taken with at least one camera having a known positional relationship relative to the medical imaging device, the tracking images depicting at least part of the element; determining any movement of the element between acquisition of the at least 2 tracking images; and generating the digital medical model from the acquired medical images, wherein the determined movement of the element is used to compensate for any movement of the patient between the acquisition of the medical images.

Abstract: A radiation image processing apparatus includes an image processing unit. The image processing unit is configured to create a device map superimposition image by superimposing a device fixed image on a map image.

Abstract: A region detection image is obtained by the detection of a subject region of a radiographic image in which radiation is transmitted through a subject and reaches a radiation detection unit and a direct radiation region of the radiographic image in which the radiation directly reaches the radiation detection unit without being transmitted through the subject. A scattered radiation image about scattered radiation components is obtained on the basis of the region detection image and scattered-radiation-spread information about the spread of scattered radiation. A radiographic image from which the scattered radiation components have been removed is obtained by the subtraction of the scattered radiation image from the radiographic image.

Abstract: A radiographic image processing device includes a radiographic image acquisition unit that acquires a radiographic image taken from a subject using radiation, a region discrimination unit that discriminates a plurality of regions using the radiographic image, a scattered radiation component-estimation section that estimates scattered radiation components of the radiation of each region using scattered radiation component-estimation processing varying for each region, a scattered radiation component-subtraction section that subtracts the scattered radiation components of each region, and an image processing unit that generates a scattered radiation component-subtracted image where the scattered radiation components have been subtracted by sequentially estimating and subtracting the scattered radiation components of each region using the scattered radiation component-estimation section and the scattered radiation component-subtraction section.

Abstract: A first positional information derivation unit derives three-dimensional positional information of at least one target point of a target structure in a subject as first positional information. A second positional information derivation unit derives three-dimensional positional information of at least one feature point on an insertion structure inserted to the target structure in the subject as second positional information. A display control unit displays a positional information screen indicating a positional relationship between the target point and the feature point on a display unit.