Alexandre is a neurosurgeon, researcher, university professor and chief of the neurosurgery department at the Pitié-Salpêtrière University Hospital. Convinced that surgery should undergo significant changes, he has focused his research on minimally invasive therapies under MR control. Since 2005, he has worked with an American team on the development and first clinical testing of a laser probe for the treatment of brain tumors under MR guidance. In 2010, he founded Carthera® to develop his inventions in the field of therapeutic ultrasound. He is now the chairman of the scientific board of the company.