Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate small left pleural effusion , and left lower lobe collapse . The left hemidiaphragm is obscured . Cardiac silhouette is unchanged . There is no pneumothorax or pneumomediastinum .
    OUTPUT:
    
1 . Small left pleural effusion and left lower lobe collapse . 2 . Left hemidiaphragm is obscured .