Hi, has any of you seen your lung CT scans? I would like to know the difference of lung ct scans between the patients of IPF and hypersensitivity pneumonitis. Google says the fibrosis of lungs on ct scan of patients with ipf start from the base of the lungs, but on ct of patients with hypersensitive pneumanitos fibrosis is located on top and middle of the lungs. The same time google says its difficult sometimes to find out what the patient got IPF or HPF so need a biopsy. I wonder why if ct scans show fibrosis on different locations.