Public domain
Microgravity
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
Dr. Harry Whelan, a pediatric Neurologist at the Medical Hospital of Wisconsin in Milwaukee and professor of Neurology at the Medical College of Wisconsin, explains the operation of light-emitting diodes (LEDs) developed for use in space plant growth experiments and now adapted for use in photodynamic therapy, a technique in which light from the LEDs activates light-sensitive, tumor-treating drugs. The technique has been used in at least two surgeries on brain tumors.
NASA Image and Video Library’s own descriptionCredit lineMicrogravity. NASA/MSFC, 2000-07-29. Public domain. ID: 0004379.
