The blood-brain barrier protects the neurons in the brain from pathogens, but unfortunately also from chemotherapy against brain tumours such as glioblastoma. Now in a four-minute treatment the blood-brain barrier is opened by some ultrasound, enabling chemotherapy. The effect lasts for about one hour. See http://www.neat-news.com/2023/05/124.php. #brain_cancer #blood_brain_barrier #ultrasound