OHSU neurosurgeon Erin Yamamoto says that in the MRI images from their study, "you can actually see dark perivascular spaces in the brain turn bright" over time, as the contrast tracer flows deeper.

As it turns out, it also revealed the gadolinium tracer in the brain, whereas the standard MRI sequences did not. "That was the key," Piantino said. "You can actually see dark perivascular spaces ...