Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Heart is normal in size and cardiomediastinal silhouette is unchanged compared to the prior examination . Streaky left basilar opacities likely represent atelectasis . There is no focal consolidation , pleural effusion , or pneumothorax . Old posterior right 7th rib fracutre again noted . Surgical clips are again noted in the right upper quadrant .
    OUTPUT:
    
No acute intrathoracic abnormality .