When it comes to brain tumor surgery, precision is paramount to achieve optimal patient outcomes. Traditional imaging techniques, such as MRI scans, are invaluable for mapping out the tumor before the operation begins. However, the dynamic nature of the brain during surgery means these pre-operative images quickly become obsolete. This is where intraoperative ultrasound (iUS) steps in as a game-changer, providing reassurance when it matters most to both the surgeon and the patient.