Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal portable chest radiographs demonstrate a central catheter which is unchanged in position , terminating in the left brachiocephalic vein , as well as a nasogastric tube with the tip within the stomach . The cardiomediastinal silhouette is within normal limits . Opacity of the right lower lobe likely represents collapse , but underlying pneumonia can not be excluded . There is also a possible small right pleural effusion . No pneumothorax or bony abnormality is seen .
    OUTPUT:
    
Probable right lower lobe collapse , worsening over the past week , with a possible small right pleural effusion . Underlying pneumonia can not be excluded .