Method and system for displaying the position and orientation of a linear instrument navigated with respect to a 3D medical image
AssigneeImactis
InventorsStephane Lavallee, Lionel Carrat
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for displaying the position and orientation of a linear instrument (1) navigated with respect to a 3D medical image (V), wherein: said linear instrument (1) is coupled to a guide (2); the guide (2) is tracked by a navigation system with respect to the 3D image (V); a plane (4) containing the axis of the linear instrument (1) is virtually attached to the guide (2); a slice reformatted in the 3D image and containing said plane (4) is displayed. Another object of the invention is a system for carrying out said method.
Claims13
A method for displaying a position and orientation of a linear instrument navigated with respect to a 3D medical image of a patient's body, the method comprising:
- providing a guide having a non-symmetrical shape, the linear instrument being configured to be coupled to the guide;
- tracking the guide by a navigation system with respect to the 3D image, the guide having a local coordinate system related to a coordinate system of the 3D medical image by a transformation matrix;
- virtually attaching a plane containing an axis of the linear instrument to the guide, a position of the plane with respect to the 3D medical image being determined using the matrix;
- displaying a slice reformatted in the 3D image and containing said plane,
- before coupling the instrument to the guide, forming with the guide a viewfinder allowing visualizing tissues that would surround the instrument if it was coupled to the guide and inserted into the patient's body according to the orientation of the guide, and
- after coupling the instrument to the guide, exploring tissues surrounding the instrument by rotating the guide around the instrument.
A system for displaying a position and orientation of a linear instrument navigated with respect to a 3D medical image of a patient's body, comprising:
- a processor adapted to be coupled to a navigation system to receive navigation data,
- a guide having a non-symmetrical shape configured to be coupled to the linear instrument and tracked by the navigation system, the guide having a local coordinate system related to a coordinate system of the 3D medical image by a transformation matrix,
- wherein a plane containing an axis of the linear instrument is virtually attached to the guide so as to allow tracking said plane virtually attached to the guide by the navigation system with respect to the 3D image, the processor being configured to determine a position of the plane relative to 3D medical image using the matrix and to compute a slice reformatted in the 3D image and containing said plane, and
- a display coupled to the processor and configured to display said reformatted slice,
- wherein the guide configured so that
- before coupling the instrument to the guide, the guide forms a viewfinder allowing visualizing tissues that would surround the instrument if it was coupled to the guide and inserted into the patient's body according to the orientation of the guide, and
- after coupling the instrument to the guide, a rotation of the guide around the instrument allows exploring tissues surrounding the instrument.
Dependencies are inferred from the claim text.