Abstract: A registration fixture for use with a surgical navigation system for registration of medical images to a three-dimensional tracking space includes a base frame adapted to be mounted over a flat panel detector of an x-ray medical imaging device, and a side frame having optical tracking markers mounted to the base frame. The base frame includes a first set of radiopaque markers embedded therein in a first predetermined pattern and arranged on a plane, and a second set of radiopaque markers embedded therein in a second predetermined pattern also arranged on another plane, which is spaced from the first set of radiopaque markers. The side frame has a plurality of optical tracking markers and is configured to detachably mount to the base frame without piercing a sterilizing drape to be interposed between the base frame and the side frame.

Abstract: A registration fixture for use with a surgical navigation system for registration of medical images to a three-dimensional tracking space includes a base frame adapted to be mounted over a flat panel detector of an x-ray medical imaging device, and a side frame having optical tracking markers mounted to the base frame. The base frame includes a first set of radiopaque markers embedded therein in a first predetermined pattern and arranged on a plane, and a second set of radiopaque markers embedded therein in a second predetermined pattern also arranged on another plane, which is spaced from the first set of radiopaque markers. The side frame has a plurality of optical tracking markers and is configured to detachably mount to the base frame without piercing a sterilizing drape to be interposed between the base frame and the side frame.

Abstract: A system includes a screw tower, an instrument, and a housing. The instrument includes a driver shaft extendable longitudinally through the screw tower, and a threaded sleeve mounted on a proximal portion of the driver shaft. The housing includes one or more retention members coupleable to the screw tower, and a threaded button threadably coupleable to the threaded sleeve. The threaded sleeve is rotatable about a longitudinal axis to urge the driver shaft longitudinally relative to the screw tower.

Abstract: A surgical system includes an XR headset and an XR headset controller. The XR headset is configured to be worn by a user during a surgical procedure and includes a see-through display screen configured to display an XR image for viewing by the user. The XR headset controller is configured to receive a plurality of two-dimensional (“2D”) image data associated with an anatomical structure of a patient. The XR headset controller is further configured to generate a first 2D image from the plurality of 2D image data based on a pose of the XR headset. The XR headset controller is further configured to generate a second 2D image from the plurality of 2D image data based on the pose of the XR headset. The XR headset controller is further configured to generate the XR image by displaying the first 2D image in a field of view of a first eye of the user and displaying the second 2D image in a field of view of a second eye of the user.

Abstract: A camera tracking system is disclosed for computer assisted navigation during surgery. The camera tracking system is configured to identify a reference array tracked by a set of tracking cameras attached to an extended reality (XR) headset, and determine whether the reference array is registered as being paired with characteristics of one of a plurality of surgical tools defined in a surgical tool database. The camera tracking system is further configured to, based on the reference array being determined to not be registered and receiving user input, register the reference array to be paired with characteristics of one of the plurality of surgical tools selected based on the user input. The camera tracking system is further configured to provide a representation of the characteristics to a display device of the XR headset for display to the user.

Abstract: An augmented reality surgical system includes a head mounted display (HMD) with a see-through display screen, a motion sensor, a camera, and computer equipment. The motion sensor outputs a head motion signal indicating measured movement of the HMD. The computer equipment computes the relative location and orientation of reference markers connected to the HMD and to the patient based on processing a video signal from the camera. The computer equipment generates a three dimensional anatomical model using patient data created by medical imaging equipment, and rotates and scales at least a portion of the three dimensional anatomical model based on the relative location and orientation of the reference markers, and further rotate at least a portion of the three dimensional anatomical model based on the head motion signal to track measured movement of the HMD. The rotated and scaled three dimensional anatomical model is displayed on the display screen.

Abstract: A surgical system for computer assisted navigation during surgery, includes at least one processor that obtains a 3D radiological representation of a targeted anatomical structure of a patient and a set of fiducials of a registration fixture. The operations attempt to register locations of the set of fiducials in the 3D radiological representation to a 3D imaging space tracked by a camera tracking system. Based on determining one of the fiducials of the set has a location that was not successfully registered to the 3D imaging space, the operations display at least one view of the 3D radiological representation with a graphical overlay indicating the fiducial has not been successfully registered to the 3D imaging space, receive user-supplied location information identifying where the fiducial is located in the 3D radiological representation, and register the location of the fiducial to the 3D imaging space based on the user-supplied location information.

Abstract: A camera tracking system receives patient reference tracking information indicating pose of a patient reference array tracked by a patient tracking camera relative to a patient reference frame. A local XR headset view pose transform is determined between a local XR headset reference frame and the patient reference frame. Remote reference tracking information is received indicating pose of a remote reference array tracked by a remote reference tracking camera. A remote XR headset view pose transform is determined between a remote XR headset reference frame of a remote XR headset and the remote reference array. A 3D computer image is transformed from a local pose determined using the local XR headset view pose transform to a remote pose determined using the remote XR headset view pose transform. The transformed 3D computer image is provided to the remote XR headset for display with the remote pose relative to the remote XR headset reference frame.

Abstract: A camera tracking system receives patient reference tracking information indicating pose of a patient reference array tracked by a patient tracking camera relative to a patient reference frame. A local XR headset view pose transform is determined between a local XR headset reference frame and the patient reference frame. Remote reference tracking information is received indicating pose of a remote reference array tracked by a remote reference tracking camera. A remote XR headset view pose transform is determined between a remote XR headset reference frame of a remote XR headset and the remote reference array. A 3D computer image is transformed from a local pose determined using the local XR headset view pose transform to a remote pose determined using the remote XR headset view pose transform. The transformed 3D computer image is provided to the remote XR headset for display with the remote pose relative to the remote XR headset reference frame.

Abstract: A surgical system includes a camera tracking system that determines a first pose transform between a first object coordinate system and the first tracking camera coordinate system based on first object tracking information from the first tracking camera which indicates pose of the first object. The camera tracking system determines a second pose transform between the first object coordinate system and the second tracking camera coordinate system based on first object tracking information from the second tracking camera indicating pose of the first object, and determines a third pose transform between a second object coordinate system and the second tracking camera coordinate system based on second object tracking information from the second tracking camera indicating pose of the second object. The camera tracking system determines a fourth pose transform between the second object coordinate system and the first tracking camera coordinate system based on combining the first, second, and third pose transforms.

Abstract: A system includes a screw tower, an instrument, and a housing. The instrument includes a driver shaft extendable longitudinally through the screw tower, and a threaded sleeve mounted on a proximal portion of the driver shaft. The housing includes one or more retention members coupleable to the screw tower, and a threaded button threadably coupleable to the threaded sleeve. The threaded sleeve is rotatable about a longitudinal axis to urge the driver shaft longitudinally relative to the screw tower.

Abstract: A system includes a screw tower, an instrument, and a housing. The instrument includes a driver shaft extendable longitudinally through the screw tower, and a threaded sleeve mounted on a proximal portion of the driver shaft. The housing includes one or more retention members coupleable to the screw tower, and a threaded button threadably coupleable to the threaded sleeve. The threaded sleeve is rotatable about a longitudinal axis to urge the driver shaft longitudinally relative to the screw tower.

Abstract: A system includes a screw tower, an instrument, and a housing. The instrument includes a driver shaft extendable longitudinally through the screw tower, and a threaded sleeve mounted on a proximal portion of the driver shaft. The housing includes one or more retention members coupleable to the screw tower, and a threaded button threadably coupleable to the threaded sleeve. The threaded sleeve is rotatable about a longitudinal axis to urge the driver shaft longitudinally relative to the screw tower.

Abstract: Modular orthopedic implants, associated instruments, and navigation methods. The modular orthopedic fixation assembly may include a modular bone fastener and a modular tulip head configured to be installed separately. The modular bone fastener may be installed and tracked with a screw extender instrument having an outer sleeve and an inner shaft coupled to the bone fastener. The screw extender instrument may continue to track the location and orientation of the bone throughout the surgical procedure for navigational integrity. The modular tulip head may be assembled to the bone fastener with a head inserter instrument, which ensures the modular head is properly seated on the installed bone fastener.

Abstract: A surgical system includes an XR headset and an XR headset controller. The XR headset is configured to be worn by a user during a surgical procedure and includes a see-through display screen configured to display an XR image for viewing by the user. The XR headset controller is configured to receive a plurality of two-dimensional (“2D”) image data associated with an anatomical structure of a patient. The XR headset controller is further configured to generate a first 2D image from the plurality of 2D image data based on a pose of the XR headset. The XR headset controller is further configured to generate a second 2D image from the plurality of 2D image data based on the pose of the XR headset. The XR headset controller is further configured to generate the XR image by displaying the first 2D image in a field of view of a first eye of the user and displaying the second 2D image in a field of view of a second eye of the user.

Abstract: A surgical system includes a camera tracking system that determines a first pose transform between a first object coordinate system and the first tracking camera coordinate system based on first object tracking information from the first tracking camera which indicates pose of the first object. The camera tracking system determines a second pose transform between the first object coordinate system and the second tracking camera coordinate system based on first object tracking information from the second tracking camera indicating pose of the first object, and determines a third pose transform between a second object coordinate system and the second tracking camera coordinate system based on second object tracking information from the second tracking camera indicating pose of the second object. The camera tracking system determines a fourth pose transform between the second object coordinate system and the first tracking camera coordinate system.

Abstract: A camera tracking system for computer assisted navigation during surgery operatively determines a first pose of a second extended-reality (XR) headset relative to stereo tracking cameras located on a first XR headset based on first tracking information from the stereo tracking cameras. The camera tracking system determines a second pose of eyes of a user wearing the second XR headset relative to the stereo tracking cameras located on the first XR headset based on second tracking information from the stereo tracking cameras. The camera tracking system also calibrates an eye-to-display relationship defining pose of the eyes of the user wearing the second XR headset to a display device of the second XR headset based on the determined first and second poses. The camera tracking system also controls where symbols are displayed on the display device of the second XR headset based on the eye-to-display relationship.

Abstract: An augmented reality surgical system includes a head mounted display (HMD) with a see-through display screen, a motion sensor, a camera, and computer equipment. The motion sensor outputs a head motion signal indicating measured movement of the HMD. The computer equipment computes the relative location and orientation of reference markers connected to the HMD and to the patient based on processing a video signal from the camera. The computer equipment generates a three dimensional anatomical model using patient data created by medical imaging equipment, and rotates and scales at least a portion of the three dimensional anatomical model based on the relative location and orientation of the reference markers, and further rotate at least a portion of the three dimensional anatomical model based on the head motion signal to track measured movement of the HMD. The rotated and scaled three dimensional anatomical model is displayed on the display screen.

Abstract: A camera tracking system is disclosed that is configured to obtain a model defining a tracking volume of a set of tracking cameras relative to pose of the set of tracking cameras, and receive tracking information from the set of tracking cameras indicating pose of an extended reality (XR) headset relative to the set of tracking cameras. The camera tracking system is further configured to generate a graphical representation of the tracking volume from a perspective of the XR headset based on the pose of the XR headset indicated by the tracking information and based the model defining the tracking volume of the set of tracking cameras, and provide the graphical representation of the tracking volume to the XR headset for display to the user.

Abstract: A system includes a screw tower, an instrument, and a housing. The instrument includes a driver shaft extendable longitudinally through the screw tower, and a threaded sleeve mounted on a proximal portion of the driver shaft. The housing includes one or more retention members coupleable to the screw tower, and a threaded button threadably coupleable to the threaded sleeve. The threaded sleeve is rotatable about a longitudinal axis to urge the driver shaft longitudinally relative to the screw tower.