Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographdemonstrates heterogeneous left lower lobe opacity with elevation of the left hemidiaphragm which has improved since previous examination . Interval decrease in size of small left pleural effusion is noted . No right pleural effusion . No pneumothorax . Mild cardiomegaly is stable . Mediastinal contour , and hila are otherwise unremarkable and unchanged in appearance since previous examinations . .
    OUTPUT:
    
1 . Improved left lower lobe atelectasis . 2 . Improved small left pleural effusion . 3 . Stable mild cardiomegaly . .