Exploring Gas Transfer and the Utility of Dynamic Chest Radiography in Long Covid Patients

This study aims to identify if breathless patients with Long COVID have reduced transfer factor on pulmonary function testing and if the degree of transfer factor reduction is correlated with the symptom severity and physiological ability to exercise. We will also investigate whether a new type of X-ray called a dynamic chest X-ray can identify perfusion abnormalities and whether these correlate with differences in diffusion capacity measured on a pulmonary function test.