I swore I attached the article! Anyway here is a link to another article that talks about ablation (always for people with interstitial disease -like me now). https://www.ajronline.org/doi/10.2214/AJR.23.30300#:~:text=Percutaneous%20ablation%20appears%20to%20be%20safe%20and%20effective%20for%20stage,)%20%5B1%2C%202%5D.
Regarding the pulmonary function test, I know they are boring - I have done five in the last year. But do you have a pulmonologist? My Radiation Oncologist righty says she is not a Pulmonologist. PFTs are not that easy to interpret
even if the report provides summary. They can indicate the difference between COPD and some other type of pulmonary disease. But if you go to the Pulmonary Fibrosis Foundation Internet page they have a document which explains PFTs.