Section: New Results

Compensation of brain shift in brain tumor surgery

Participant : Hadrien Courtecuisse.

During brain tumor surgery, planning and guidance are based on pre-operative images which do not account for brain-shift. However, this shift is a major source of error in neuro-navigation systems and affects the accuracy of the procedure. The vascular tree is extracted from pre-operative Magnetic Resonance Angiography and from intra-operative Doppler ultrasound images, which provides sparse information on brain deformations. The pre-operative images are then updated based on an elastic registration of the blood vessels, driven by a patient-specific biomechanical model. We develop a biomechanical model [17] to extrapolate the deformation to the surrounding soft tissues. Our method has proved to efficiently compensate for brain deformation while being compatible with a surgical process.