Researchers are testing low-dose radiation to treat the painful symptoms of osteoarthritis in the knee.

The study, published by researchers in Korea and presented at the American Society for Radiation Oncology (ASTRO) annual meeting in September, suggests that a single course of radiation can be a “safe and effective” treatment option.

Knee osteoarthritis is a degenerative joint disease causing pain, swelling and stiffness in the knees that worsens over time.

The randomized clinical trial enrolled 114 patients with moderate-to-mild knee osteoarthritis who were each assigned a very low dose of radiation, a low dose or a placebo.

The only other pain relief used during the study was acetaminophen.

The participants went through six sessions as researchers assessed “meaningful improvement”

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