Use of Shear Wave Elastography for Intraoperative Brain and Tumor Stiffness Measurements

Inclusion Criteria: * Patients must be at least 18 years old. * Patients must have planned surgery for resection of a newly diagnosed or recurrent brain tumors. * Patients with tumors located in the brain cortex or superficial white matter in which introduction of the ultrasound probe is straightforward and does not pose a risk for intraoperative complications. * Patients must have a Karnofsky performance status ≥ 60%. * Patient or legally authorized representative (LAR) willing to provide written informed consent. Exclusion Criteria: * Patients with deep-seated brain tumors in which introduction of the ultrasound probe poses an increased risk. * Patients with a history of any brain infections. * Patients with implanted devices. * Patients with any other neurological/neurosurgical disease that could affect tissue stiffness. * Patients with any other structural brain defect that could affect tissue stiffness.