No filling defect demonstrated within the pulmonary arteries. Almost complete left lower lobe collapse. Large left pleural fluid collection. Minor dependent atelectasis in the right lung. Background changes of emphysema. No pneumothorax. Heart and mediastinum are unremarkable. Imaged upper abdomen is unremarkable. Bilateral breast prostheses noted. Left clavicular intramedullary nail is partially imaged with a small volume of adjacent surgical emphysema. Left-sided rib fixation is noted as well as multiple rib fractures.