Astronauts can now be X-rayed in orbit. The crew of Fram2, a private SpaceX mission that circled the Earth’s poles in the spring of 2025, captured the first diagnostic X-rays in space — and independent radiologists judged them every bit as good as scans acquired on the ground. The findings of the SpaceXray study were published in Radiology, the flagship journal of the Radiological Society of North America (RSNA).
The research was led by Sheyna Gifford, MD, assistant professor of aerospace medicine at the Mayo Clinic in Rochester, Minnesota. Having a second imaging modality available beyond Earth, she noted, has been a long-standing dream of aerospace medicine. “X-rays are fast, easy and diagnostically valuable,” Gifford said.
Inside the SpaceXray experiment
Fram2 lifted off on a Falcon 9 rocket on March 31, 2025, flew a 90-degree polar orbit at an altitude of 425 to 450 kilometers, and splashed down on April 4 after 3 days and 14 hours in space. Tucked into its experiment manifest was something no crewed mission had ever carried: a commercial, off-the-shelf portable radiography system paired with an ultraportable wireless X-ray generator. SpaceX put the hardware through impact and compatibility testing before clearing it for flight.
Perhaps the most striking detail is who ran the equipment. Three crew members with no medical background received just four hours of training. Working from a preflight protocol, they imaged a calibration phantom, a smartwatch, and each other’s hand, forearm, abdomen, pelvis and chest. Every exposure was transmitted immediately to an onboard computer, allowing near real-time review.
Back on Earth, three independent radiologists compared the in-flight radiographs with preflight images of the same crew members. They found no difference in overall image quality, spatial resolution or contrast resolution. Every radiograph reached diagnostic quality, although the chest, pelvis and abdomen views scored lower on patient positioning. Estimated radiation exposure was no higher than that of standard clinical imaging on Earth. The one casualty was the generator itself, which suffered superficial structural damage on landing — its internal hardware and radiographic output, however, remained intact.
Why radiography was considered off-limits in microgravity
For more than 40 years, ultrasound was the only reliable imaging modality in space, and the reasons were practical. Conventional X-ray machines are large and heavy, deliver substantial radiation, and blur badly with motion — a serious problem in microgravity, where patient, operator and machine all float freely. Ultrasound is compact, but it demands significant operator training and a physical transmission medium such as gel, which limits what an untrained crew can achieve with it.
Lightweight digital flat-panel detectors and compact battery-powered generators changed the calculus. In 2022, the same research team proved the concept by acquiring a digital hand radiograph during a parabolic flight, where each aircraft arc yields roughly twenty seconds of weightlessness. Going to orbit raised harder questions. Would the hardware survive launch? Could untrained crew members position a detector, a generator and a floating patient accurately inside a capsule?
What it means for imaging on Earth
The answers matter well beyond spaceflight. The same recipe that made orbital radiography possible — light hardware, a wireless generator and simplified workflows — is already driving imaging out of the radiology suite. Hospitals increasingly rely on mobile X-ray systems at the bedside, and the logic extends naturally to remote clinics, ships, polar stations and disaster zones, where space, power and specialist staff are as scarce as they are in a capsule.
Gifford sees the bigger picture in exactly those terms. Miniaturized, autonomous radiography systems, she argues, could reshape global public health — “the sky is not the limit,” as she put it. Compact hardware also pairs naturally with software: as studies of AI performance on chest X-rays show, algorithmic support will need careful validation before it can safely backstop non-specialist operators, in orbit or anywhere else.
The team also flagged critical non-medical uses for orbital radiography: inspecting electronics and spacesuits, troubleshooting malfunctioning satellites, and even equipping lunar rovers to analyze soil by X-ray.
Limitations and next steps
The authors are candid about the study’s limits. The lower positioning scores on chest, pelvis and abdominal views show that radiographic technique still matters, and that four hours of training only goes so far. The crew themselves suggested practical fixes, chief among them mounting mechanisms to anchor the detector and generator so components stop drifting during exposures.
The group — whose coauthors include Michael Pohlen, Adam S. Wang, David J. Lerner, Karim S. Karim and Lonnie G. Petersen — calls for prospective studies to define indication guidelines, interpretation protocols and preflight baseline imaging for astronauts. With long-duration missions to the Moon and Mars on the horizon, knowing what “normal” looks like for each crew member before departure may prove as valuable as the hardware itself.
Source: ITN Online
