Review of Hyperpolarized Pulmonary Functional 129Xe MR for Long‐COVID

The respiratory consequences of acute COVID-19 infection and related symptoms tend to resolve 4 weeks post-infection. However, for some patients, new, recurrent, or persisting symptoms remain beyond the acute phase and persist for months, post-infection. The symptoms that remain have been referred to as long-COVID. A number of research sites employed ¹²⁹ Xe magnetic resonance imaging (MRI) during the pandemic and evaluated patients …