The question is does whatever is seen in a CT scan or x-ray impact your breathing and how. That's why the PFT is the definitive diagnostic tool for COPD.

Thanks what the x-ray picked up was hyperinflation of the lungs possibly due to COPD/emphysema hence my sceptism when the PFT showed extremely good results and considering the weekend I had SOB and wheezing which just kinda comes on suddenly. I am also asthmatic

Different problems are seen in a chest X ray than a respiratory function test,ie inflammation of the lungs .

Ok so I had another look at my results and noticed that doctor put the incorrect gender details

Thank you so much this really helps so I was actually freaking out for nothing