Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval decrease in left pleural effusion . Lungs clear bilaterally without pneumothorax or pulmonary edema . Sternotomy wires are intact . Heart size is top normal with normal mediastinal contour and hila . No bony abnormality .
    OUTPUT:
    
Interval decrease in left pleural effusion . No pneumothorax .