Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been marked decrease in opacification of the left lower hemithorax corresponding to interval drainage of pleural effusion . Streaky remaining opacities are most suggestive of associated atelectasis . On the right , there is mild blunting of the right costophrenic sulcus and slight elevation of the right hemidiaphragm , which is nonspecific but could be seen with a small subpulmonic effusion . Streaky medial right basilar opacities , not overlapping with the right cardiac border , are suggestive of minor atelectasis in the right lower lobe , which has increased somewhat . There is no pneumothorax .
    OUTPUT:
    
Marked decrease in left - sided pleural effusion with no evidence for pneumothorax following thoracentesis .