as I can see you have not mentioned about the symptoms your husbands having.
I would have appreciated much.
Okay lets see the x ray
the chest shows increased vascular swellings.
this can occur because of infection and also because of inflammation.
inflammation can be infective in origin or allergic in origin.
and also due to this thickening also occurs.
it does give x ray picture of bronchitis
but clinical history is what most important here.