There are many abnormalities that can be identified on a chest radiograph. This chapter introduces some of the more common findings seen on a chest radiograph including atelectasis, pulmonary edema, pleural effusion, consolidation, pneumothorax, pneumomediastinum, hyperaeration, masses, and COVID-19. The more radiographs one reviews and evaluates, the more findings of normal variants and abnormalities one will be able to identify. Comparing one’s interpretation with a radiologist’s final reading is an excellent way to improve one’s skills. If there is something identified or not identified by the radiologist, examine the films again. One may be able to visualize the area noted in the report, which will help one to identify subtle findings on other images. Establishing a working relationship with radiology colleagues will also enhance one’s knowledge and proficiency.