Presented are methods and systems for determining, monitoring, and displaying the relative positioning of two rigid bodies during surgery. In particular, the present disclosure relates to methods and systems for positioning a prosthesis relative to a bone during a surgery as well as to systems and methods for verifying resulting relative positioning of adjacent bones.

A performance capture system is provided to detect one or more active marker units in a live action scene. Active marker units emanate at least one wavelength of light that is captured by the performance capture system and used to detect the active markers in the scene. The system detects the presence of the light as a light patch in a capture frames and determines if the light patch represents light from an active marker unit. In some implementations, various active markers in a scene may emanate different wavelengths of light. For example, wavelengths of light from multi-emitting active marker units may be changed due to various conditions in the scene.

Disclosed are a system and method for quantifying changes in animal posture from video recordings of multiple interacting animals. Also disclosed are a system and method for training a posture identification algorithm efficiently with minimal human effort and evaluating the posture of millions of animal images. The disclosed process employs video recordings of behaving animals to produce a full set of geometrical coordinates for each body part over time. Inter alia, the disclosed system should be useful for organizations interested in doing large small-molecule screens to find drugs that affect the behavior of animals, and for those investigating new behavioral diagnostics for human patients. The disclosed system allows one to record video of animals and then automatically calculate the position of each body part over time. The output of this calculation can be used for simple analysis of the amount of movement for specific body parts, or part of a more complex scheme for measuring behaviors.

This method for acquiring a spatial map of auditory perception of a subject comprises a plurality of successive test sequences, each test sequence comprising steps of: a) calibration (1002) of the subject's position, by displaying instructions to the subject, using a head-mounted visual display system worn by the subject, in order to acquire a reference position of the subject, the subject's position being measured using a video motion capture system by measuring the spatial coordinates of a first optical marker worn by the subject, b) choosing (1004) spatial coordinates of a target location of a sound source, said target cation being located around the subject, c) emitting (1006) a predefined sound, using a sound source placed at said target location, d) in response to acquisition instructions generated by the subject using an acquisition interface, acquiring (1008) an estimated location of said sound source, by using the video motion capture system to measure the spatial coordinates of a second optical marker held and pointed by the subject towards a perceived location of the sound source.

A method of reducing the x-ray dose of a patient in an x-ray system includes defining a region of interest of the patient, obtaining at least two tracking images of a tracking element taken with at least one camera having a known positional relationship relative to an x-ray source and/or sensor, determining any movement of the tracking element between the acquisition of at least two tracking images, adjusting the collimator of the x-ray source to compensate for any movement of the tracking element between the acquisition of the at least two tracking images, providing that the field of exposure of the x-ray source is confined to the region of interest and obtaining at least one x-ray image of the region of interest after the adjustment of the collimator.

A method comprising: receiving a radiographic image dataset representing a sequential radiographic scan of a region of a human subject; receiving three-dimensional (3D) image data representing an optical scan of a surface of said region, wherein said 3D image data is performed simultaneously with said sequential radiographic scan; estimating a time-dependent motion of said subject during said acquisition, relative to a specified position, based, at least in part, on said 3D image data; and using said estimating to determine corrections for said radiographic image dataset, based, at least in part, on a known transformation between corresponding coordinate systems of said radiographic image dataset and said 3D image data.

A method for measuring dynamic movement of a joint, the method comprising the steps of: measuring relative rotation of the joint using pair of Inertia measurement units, each attached to the skin on either side of said joint; capturing a plurality ultrasound images of a bone proximate to a first of said IMU's; identifying markers on said bone; tracking displacement of the markers; correlating said displacement with the relative rotation of the joint, and so; measuring the dynamic movement of the joint.

A system for predicting a three-dimensional human body joint angle according to an embodiment predicts information on a human body joint angle of a new subject by photographing a motion of a subject at different three-dimensional positions and using information on the human body joint angle according to the generated motion of the subject and information on the human body joint angle according to the motion of the subject.

The invention relates to an interactive training module, comprising at least one image-displaying wall (1, 2) with which motion sequences and/or objects can be displayed to a user, at least one position sensing device (7) with which the positions of at least the user's hands can be detected, and a control unit with which these positions can be compared with those which are stored in the control unit, wherein the control unit can display correction information to the user by means of the at least one image-displaying wall (1, 2) on the basis of the difference between the stored position and the detected position.

A device for attaching a localization marker to the lower jaw of an individual. The marker includes an inner face provided with two attachment lugs including an intra-oral portion having a general U-shape adapted for coming into contact with the outer face of the teeth of the lower jaw, an extra-oral portion including an attachment element for the marker, a connecting portion connecting the intra-oral portion and the extra-oral portion. The attachment element includes two recesses each adapted for receiving a respective lug of the marker, the recesses being separated by a tab adapted for being elastically deformed when one of the lugs is engaged in a respective recess so as to exert a pressure force on the lug.