I was diagnosed via bronchoscopy and haven't produced a positive sputum sample since; my sputum samples seem to be mostly if not entirely saliva. I doubt they are reliable and the CT after six months of antibiotics shows slight improvement at best. That could be attributed to airway clearance, which didn't become part of my lifestyle until after the previous scan. So I don't feel confident that the current antibiotic regimen is working. I'm evaluating if it's possible to try Arikayce without getting another bronchoscopy now because I may want a bronchoscopy with biopsy next year, pending results of a follow-up CT.