First Diagnostic X-Rays Obtained in Space, Expanding Medical Capabilities for Astronauts

For forty years, astronauts in orbit have relied on a single imaging tool: ultrasound. It was portable, it worked in the weightlessness of space, and it was the only option available. But ultrasound has hard limits. It cannot see everything a doctor needs to see. It cannot diagnose every injury or illness. As human spaceflight expands—with missions to the Moon and Mars on the horizon, and commercial flights becoming routine—the medical toolkit available to crews in orbit has begun to feel inadequate.

That constraint just shifted. In September 2026, a team of researchers led by Dr. Sheyna Gifford of the Mayo Clinic conducted the first diagnostic X-ray imaging during a commercial spaceflight, proving that radiography—fast, reliable, and far more versatile than ultrasound—can work in microgravity. The achievement was published in the journal Radiology and represents a fundamental expansion of what space medicine can do.

The challenge was not theoretical. Traditional X-ray machines are large, heavy, and produce significant radiation exposure. They also generate blurred images when anything moves—and in space, everything moves constantly. For decades, this seemed to make orbital radiography impractical. But the landscape changed with the emergence of portable X-ray systems designed for use in remote areas, at sporting events, and in resource-limited settings around the world. These machines are compact, they run on solar power, and they can be operated by people with minimal training. Gifford and her colleagues wondered whether the same technology that works at the Kentucky Derby might work at orbital altitude.

They began with a parabolic flight in 2022—an aircraft that climbs and dives to create brief periods of weightlessness. Three crew members trained for four hours on the portable radiography system. They succeeded in obtaining a digital X-ray of a hand in simulated microgravity. That proof of concept led to a partnership with SpaceX and entrepreneur Chun Wang to test the system during Fram2, a commercial spaceflight mission that entered polar orbit and remained aloft for just over three and a half days.

During the flight, the crew used an ultraportable wireless digital X-ray generator to image human anatomy and equipment. They acquired X-rays of a hand, forearm, abdomen, pelvis, and chest—both before launch and in orbit. They also X-rayed a phantom object to calibrate the system, then replicated those images with the actual equipment once they returned to Earth. Three independent radiologists evaluated all the images. The verdict: no meaningful difference in overall image quality between the in-flight and ground-based scans. The chest, pelvis, and abdomen images scored slightly lower for positioning, but spatial resolution, contrast, and diagnostic utility were consistent with what radiologists expect from terrestrial X-rays. The crew reported that the system was intuitive and the protocol straightforward.

What makes this significant is not merely that X-rays now work in space—it is what that capability unlocks. On long missions to the Moon or Mars, astronauts will face injuries and illnesses that ultrasound cannot adequately diagnose. A fractured bone, a pneumothorax, internal bleeding—these require the kind of detailed anatomical imaging that X-rays provide. Beyond crew health, Gifford noted, the technology has applications to mission-critical tasks: inspecting electronics, evaluating spacesuits, examining malfunctioning satellites in orbit. The only way to see inside these objects without disassembling them is to X-ray them.

Gifford's team included radiologists, engineers, and technicians from institutions across North America and Japan—the University of California San Diego, Stanford, MIT, the University of Waterloo, and others. The breadth of the collaboration reflects the interdisciplinary nature of space medicine, a field still in its infancy. "By acquiring the first human and equipment X-rays in space, our study demonstrates the feasibility of in-orbit radiography and expanded diagnostic capabilities for crew health and hardware evaluation," Gifford said in a summary of the work. "Acquiring diagnostically useful X-rays in space is something that anyone can do. Three very talented nonmedical people with four hours of training in one of the harshest environments did it right and did it well."

Looking forward, Gifford envisions smaller, more rugged systems that could be integrated into future missions. She also sees potential far beyond orbit: miniaturized autonomous X-ray systems distributed globally could transform public health access in underserved communities. The technology that now works in the vacuum of space may prove equally revolutionary on Earth.