Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were reviewed . Compared to the most recent prior , the right lower lung opacity projecting over the right cardiophrenic sulcus has cleared . Mild left lower lobe atelectasis and low lung volumes and mild cardiomegaly persist . Mediastinal contours and pleural surfaces are normal .
    OUTPUT:
    
Interval resolution of right lower atelectasis . Unchanged mild cardiomegaly .