Covid-19 could be causing lung abnormalities still detectable more than three months after patients are infected, researchers suggest.
A study of 10 patients at Oxford University used a novel scanning technique to identify damage not picked up by conventional scans.
It uses a gas called Xenon during MRI scans to create images of lung damage.
Lung experts said a test that could spot long-term damage would make a huge difference to Covid patients.
The Xenon technique sees patients inhale the gas during a magnetic resonance imaging (MRI) scan, BBC reported.
