Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are unchanged with widened mediastinum and moderate cardiomegaly . The upper lungs are clear . There is no pneumothorax . Small bilateral effusions larger on the left side have improved on the left . There is no pulmonary edema . . There are mild degenerative changes in the thoracic spine sternal wires are aligned
    OUTPUT:
    
Improved left pleural effusion and adjacent atelectasis .