Some neurosurgeons are testing an acrylic prosthesis that lets them peer into patients’ heads with ultrasound.Some neurosurgeons are testing an acrylic prosthesis that lets them peer into patients’ heads with ultrasound.Read MoreSkull (Body Part), Prostheses, Brain, Ultrasonic Imaging and Sonograms, Surgery and Surgeons, Brain Cancer, Hydrocephalus, Therapy and RehabilitationNYT > Health