Inclusion Criteria:  X-rays that meet the following requirements will be included:  Chest X-ray Belong to patients over 18 years of age. Advocacy and digital acquisition Study conducted in the aforementioned institutions and stored in their respective Picture Archiving and Communication System  Exclusion Criteria:  X-rays that are excluded:  Poor technique (low contrast, veiled, off-center) Presence of abnormal position of the patient during acquisition.