Methods of adjusting a virtual implant and related surgical navigation systems
Inventors
Decker, Ryan • Forsyth, Jeffrey • Crawford, Neil R. • Johnson, Norbert • Hussain, Mir • Berkowitz, Andrew • Brauckmann, Michael
Assignees
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Publication Number
US-12465433-B2
Publication Date
2025-11-11
Expiration Date
Abstract
Methods may be provided to operate an image-guided surgical system using imaging information for a 3-dimensional anatomical volume. A pose of a probe that defines a longitudinal axis may be detected based on information received from a tracking system. A placement of a virtual implant for the 3-dimensional anatomical volume may be determined based on the pose of the probe and based on an offset from an end of the probe along the longitudinal axis, such that a trajectory of the virtual implant is in alignment with the longitudinal axis of the probe in the pose. After determining the placement of the virtual implant, the virtual implant may be adjusted in response to movement of the probe while maintaining the trajectory of the virtual implant.
Core Innovation
The invention provides an image-guided surgical navigation system that uses imaging information for a 3-dimensional anatomical volume and detects a pose of a probe based on information received from a tracking system, where the probe defines a longitudinal axis. Upon receiving an initial placement instruction from a user, the system determines an initial placement and a linear trajectory of a virtual implant for the 3-dimensional anatomical volume based on the pose of the probe, using a non-zero offset from an end of the probe along the longitudinal axis.
The linear trajectory of the virtual implant has a geometric relationship with the longitudinal axis of the probe in the pose, including alignment. After determining the initial placement of the virtual implant, the system adjusts the position of the virtual implant along the linear trajectory and only along the linear trajectory responsive to movement of the probe, while maintaining the offset proportionally.
In some implementations, the system includes a processor and memory with executable instructions to perform detection of probe pose, determination of virtual implant initial placement and trajectory, and subsequent trajectory-only adjustment. The system further supports tracking markers and camera-based tracking information for determining the probe pose, and it provides virtual implant rendering with first and second reformatted image data tied to the initial placement and subsequent adjustment.
Claims Coverage
The document includes two independent claims. Across these independent claims, the inventive coverage centers on probe-pose detection with a probe longitudinal axis, determining a virtual implant initial placement and a linear trajectory using a non-zero offset from the probe end, and constraining subsequent virtual implant adjustment to the linear trajectory only while proportionally maintaining the offset during probe movement.
Probe pose detection with longitudinal axis
Detecting a pose of a probe based on information received from a tracking system, wherein the probe defines a longitudinal axis.
Initial virtual implant placement and linear trajectory using non-zero offset
Upon receiving an initial placement instruction from a user, determining an initial placement and a linear trajectory of a virtual implant for the 3-dimensional anatomical volume based on the pose of the probe and based on a non-zero offset from an end of the probe along the longitudinal axis, such that the linear trajectory of the virtual implant is in a geometric relationship with the longitudinal axis of the probe in the pose, including alignment.
Trajectory-only virtual implant adjustment with proportional offset maintenance
After determining the initial placement of the virtual implant, adjusting the position of the virtual implant along the linear trajectory and only along the linear trajectory responsive to movement of the probe while proportionally maintaining the offset.
Processor-executable system implementing pose, placement, and constrained adjustment
A surgical navigation system comprising a processor and memory with instructions executable by the processor to cause detection of a pose of a probe based on information received from a tracking system; determination of an initial placement and a linear trajectory of a virtual implant based on the pose and a non-zero offset; and adjustment of the virtual implant position along the linear trajectory only responsive to movement of the probe while proportionally maintaining the offset.
Overall, the independent claim set is directed to an image-guided surgical navigation approach where a virtual implant is placed and constrained to a linear trajectory defined relative to a probe longitudinal axis via a non-zero offset, and the virtual implant is subsequently adjusted only along that trajectory with proportional maintenance of the offset as the probe moves.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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