AUGMEDICS LTD.

A marker ( 40 ) for image guided surgery, consisting of a base ( 94 ), having a base axis, connecting to a clamp ( 42 ), and an alignment target ( 44 ). The alignment target includes a target region ( 120 ) having an alignment pattern formed thereon, and a socket ( 124 ) connected to the target region and configured to fit rotatably to the base, whereby the alignment target is rotatable about the base axis. The alignment target also includes an optical indicator ( 162 ) for the socket indicating an angle of orientation of the alignment target about the base axis.

An imaging system, including a head-mounted display worn by a system operator. A marker defines a plane when attached to a human subject. Optically reflective elements are disposed on the marker and on opposing sides of the plane in a non-symmetrical arrangement with respect to the plane. A memory stores a graphical representation of a tool used in a procedure performed on the human subject, and an image of anatomy of the human subject. A camera attached to the display acquires an image of the marker and the tool. A processor analyzes the image to identify the plane and to identify a side of the plane wherein the camera is located, and to render to the display the image of the anatomy of the human subject with the graphical representation of the tool superimposed thereon from a point of view in the identified side of the plane.

Apparatus, including a retaining structure ( 54 ), positioned near a subject's eye that has a pupil with a diameter, an optical combiner ( 52 A) mounted on the structure before the eye, and a pixelated screen ( 60 A) having an array of variably transparent pixels coating the combiner. There is an image capturing device ( 68 A) mounted on the structure to capture an image of a scene viewed by the eye, and a projector ( 64 A) is mounted on the structure to project at least one of a portion of the captured image and a stored image onto a section of the screen at a selected location thereof. A processor ( 26 ) renders the screen section at least partially opaque, selects the section location in response to a region of interest in the scene identified by analysis of the captured image, and determines a dimension of the section in response to the pupil diameter.

Apparatus and methods are described including tracking a tool portion and a patient marker from a first line of sight, using a first tracking device disposed upon a first head-mounted device that includes a display. The tool portion and the patient marker are tracked from a second line of sight, using a second tracking device. When a portion of the patient marker and the tool portion are both within the first line of sight, an augmented reality image is generated upon the first display based upon data received from the first tracking device and without using data from the second tracking device. When at least the patient marker portion and the tool portion are not both within the first line of sight, a virtual image of the tool and anatomy of the patient is generated using data received from the second tracking device. Other applications are also described.

A head-mounted display system includes a frame; an adjustable strap assembly that includes a first side strap coupled to the frame; a second side strap coupled to the frame; and an adjustment mechanism configured to adjust a circumferential size defined by the first side strap, the second side strap, and the frame; a see-through display assembly pivotably coupled to the frame; a first temple housing pivotably coupled to the frame and slidably coupled to the first side strap; and a second temple housing pivotably coupled to the frame and slidably coupled to the second side strap.

Disclosed herein are systems, devices, and methods for image-guided surgery. Some systems include a near-eye unit, having a see-through augmented-reality display, which is configured to display graphical information with respect to a region of interest (ROI) on a body of a patient, including a bone inside the body, that is viewed through the display by a user wearing the near-eye unit. A processor, which is configured to access three-dimensional (3D) image data with respect to the bone, processes the 3D image data so as to identify a first 3D shape of the bone prior to a surgical procedure on the bone and a second 3D shape of the bone following the surgical procedure, to generate, based on the first and second 3D shapes, an image showing a part of the bone that was removed in the surgical procedure, and to present the image on the see-through augmented-reality display.

Apparatus and methods are described including tracking a tool portion and a patient marker from a first line of sight, using a first tracking device disposed upon a first head-mounted device that includes a display. The tool portion and the patient marker are tracked from a second line of sight, using a second tracking device. When a portion of the patient marker and the tool portion are both within the first line of sight, an augmented reality image is generated upon the first display based upon data received from the first tracking device and without using data from the second tracking device. When at least the patient marker portion and the tool portion are not both within the first line of sight, a virtual image of the tool and anatomy of the patient is generated using data received from the second tracking device. Other applications are also described.

An imaging system, including a head-mounted display worn by a system operator. A marker defines a plane when attached to a human subject. Optically reflective elements are disposed on the marker and on opposing sides of the plane in a non-symmetrical arrangement with respect to the plane. A memory stores a graphical representation of a tool used in a procedure performed on the human subject, and an image of anatomy of the human subject. A camera attached to the display acquires an image of the marker and the tool. A processor analyzes the image to identify the plane and to identify a side of the plane wherein the camera is located, and to render to the display the image of the anatomy of the human subject with the graphical representation of the tool superimposed thereon from a point of view in the identified side of the plane.

Disclosed herein is a near eye assembly having a retaining structure (e.g., a spectacle frame or head up display mounted on a helmet) that is configured to be positioned in proximity to the eye of a user of the assembly. An optical combiner may be mounted on the retaining structure in front of the user eye. The optical combiner may at least partially transmit elements of a scene in front of the assembly through the combiner. In addition, the optical combiner may receive a visible radiation transmission derived from a scene, and/or a visual transmission such as a presentation of data or a marker, and redirect the transmission back to the user's eye.

Disclosed herein is a near eye assembly having a retaining structure (e.g., a spectacle frame or head up display mounted on a helmet) that is configured to be positioned in proximity to the eye of a user of the assembly. An optical combiner may be mounted on the retaining structure in front of the user eye. The optical combiner may at least partially transmit elements of a scene in front of the assembly through the combiner. In addition, the optical combiner may receive a visible radiation transmission derived from a scene, and/or a visual transmission such as a presentation of data or a marker, and redirect the transmission back to the user's eye.