Transposition of image-defined trajectories into arc-quadrant centered stereotactic systems.

Area of Science:

• Neurosurgery
• Medical Imaging
• Biomedical Engineering

Background:

• Stereotactic surgery requires precise targeting of intracranial structures.
• Existing methods for trajectory planning can be complex and time-consuming.
• The Leksell stereotactic frame, modified by Komai, utilizes an arc-quadrant centered design.

Purpose of the Study:

• To present a methodology and computer program for transposing image-defined trajectories into stereotactic space.
• To adapt arc-quadrant centered stereotactic frames for use with CT scanners.
• To enable interactive target and trajectory selection using multiplanar reformatted images.

Main Methods:

• Development of a computer program for trajectory transposition.
• Adaptation of arc-quadrant centered stereotactic frames (Leksell, Komai modified) to CT gantries.
• Utilizing isocentric mounting and parallel alignment to the scanning plane.
• Interactive target and trajectory selection based on multiplanar reformatted CT images.
• Mathematical derivation of angles A (coronal) and B (sagittal) for precise aiming.

Main Results:

• A functional methodology and computer program for image-guided stereotactic trajectory planning.
• Successful adaptation of stereotactic frames for CT-based planning.
• Demonstration of interactive target selection and trajectory definition.
• Presentation of the mathematical basis for calculating aiming angles.

Conclusions:

• The presented methodology and computer program facilitate accurate transposition of image-defined trajectories into stereotactic space.
• The adapted stereotactic frame system allows for interactive and precise targeting using CT imaging.
• This approach enhances the capabilities of stereotactic neurosurgery by integrating advanced imaging and planning techniques.