A new minimally invasive knee procedure delivered year-long pain relief and improved mobility for most osteoarthritis patients—without surgery. Credit: Shutterstock A minimally invasive procedure that blocks abnormal blood vessels around the knee may offer long lasting relief for people with osteoarthritis, according to new research published on June 16 in Radiology , a journal of the Radiological Society of North America (RSNA). Osteoarthritis is the most common type of arthritis and is a