Elizabeth Zhang-Velten, MD, PhD on Instagram: "It can be terrifying to hear that you need radiation to the brain. The good news is that recent research shows that focal radiation can be used instead of whole brain radiation for even up to 20 brain metastases. At USC Newport Beach, we use mask immobilization, which patients prefer to conventional Gamma Knife frame. The mask is hard for patients to tolerate if they have claustrophobia, so we work with you and give you medicine as needed to get thr