Scientists in Canada have devised a way to non-invasively bypass the blood-brain barrier in order to more effectively deliver chemotherapy to brain tumors.

Scientists have developed a method to more effectively deliver chemotherapy to brain tumors by non-invasively permeating the blood-brain barrier. 
That barrier has been likened to saran wrap—it coats the brain's blood vessels and protects our most vital organ from toxic substances. 
But its protective ability has proven a challenge for cancer treatments.
Dr. Todd Mainprize, principal investigator of the study, said