Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal lateral views of the chest were performed ( 3 exposures ) . Streaky opacification in the lung bases is thought to represent atelectasis as seen on the same day CT . There is no focal consolidation to suggest pneumonia . There is no pleural effusion or pneumothorax . The cardiac silhouette is top - normal in size . There is a hiatal hernia . The mediastinal contours and pleural surfaces are normal . Retained enteric contrast is seen within the imaged upper abdomen . There is a left nondisplaced rib fracture .
    OUTPUT:
    
No acute cardiopulmonary process . There is a left non-displaced rib fracture .