note

key points of neural navigation accuracy

• coil localization
  • 3D localization technique to locate the coil and reference trackers (normally optical or electromagnetic),
  • Manufacturing tolerances of the coil and trackers;
• Movement of the reference tracker during examinations: movement affects the detected coil position and thereby the calculated intracranial E-fields;
• E-field computation model:
• errors in the coil’s output field, unknown and/or varying coil characteristics: shape, size, details of the copper windings,
• computational model of the E-field (e.g., numerical uncertainties, simplified tissue characteristics),
• fitting of the computational model to the individual head;
• Errors in alignment of anatomical images to live situation: ◦ registration algorithm that aligns the individual head MRI’s and the live head,◦ limited resolution of the MRI and distortions from the true anatomy. (pdf)

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