Illegal CT film recycling exposes patient medical data: what healthcare privacy means in the digital age

Investigative reporting revealed that street vendors in Beijing and other Chinese cities are buying discarded medical CT films and X-rays for as little as 1.5 yuan per sheet. The films are collected in bulk, processed to extract silver — which has surged in value — but the patient names, ID numbers, medical histories, and hospital information printed on the films are also exposed in the process. Second-hand platforms have seen a surge in bulk purchasing of medical films, with some sellers offering to recycle by the kilogram.

Knowledge point: physical media and medical privacy

The CT film recycling scandal highlights an overlooked dimension of data privacy: physical media. While hospitals have invested heavily in digital data security — encryption, access controls, audit logs — the physical X-ray and CT films stored in archives often contain the same sensitive information with far fewer protections. When these films enter the recycling chain, patient data becomes accessible to anyone handling the material. The lesson extends beyond healthcare: any physical medium carrying personal data (printed documents, ID copies, medical records) needs the same disposal protocols as digital data.

The silver connection

The surge in CT film recycling is partly driven by silver prices. Medical X-ray films contain silver halide emulsions — typically 5-10 grams of silver per kilogram of film. With silver prices rising dramatically in 2026, the economic incentive to collect and process these films has grown. But the extraction process, often done by unlicensed recyclers using harsh chemicals, poses both environmental risks and privacy violations.