This invention relates to the technical field of dynamic correction of brain deformation in neurosurgical navigation, specifically to a neurosurgical navigation method and
system for adaptive correction of brain deformation. The method involves acquiring preoperative MRI data to extract initial
cerebrospinal fluid (CSF) level, three-dimensional domain of the whole brain, and baseline
elastic modulus, and recording steady-state
intracranial pressure and baseline
pulse wave amplitude. Intraoperatively, real-time acquisition of
head tilt angle, mean
intracranial pressure,
pulse wave amplitude, CSF drainage velocity, and observed
cortical surface displacement is performed. Based on this, the dynamic absolute height of the CSF level and equivalent
elastic modulus are calculated, a total
potential energy functional with dynamic physiological boundaries and stiffness constraints is constructed, and the three-dimensional
displacement field is solved using observed cortical displacement as a forced boundary. Finally, an inverse addressing strategy is used to correct the images, and navigation is restored via
DICOM flow propagation. This invention eliminates the accumulated errors in deep extrapolation caused by neglecting physiological constraints in traditional static models by fusing real-time intraoperative physiological data with a
variational model of continuous medium
mechanics, thus achieving adaptive correction of brain deformation.