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Chest computed tomography (CT) scan images of three groups. a, b) Patient without fibrosis. Diagnosis, no fibrosis (a) and 26-month follow-up, no fibrosis (b). c, d) Patient without fibrosis on initial CT and with fibrosis on final CT. Diagnosis, no fibrosis (c) and 124-month follow-up, grade 3 fibrosis (d). e, f) Patient with fibrosis on initial CT and on final CT. Diagnosis, grade 1 fibrosis (e) and 37-month follow-up, grade 1 fibrosis (f).
