Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On the frontal projection , the right lower lobe appears to be better aerated and the previous identified opacity is lower less conspicuous , although there is no lateral projection for comparison . Bibasilar atelectasis is noted . The remainder of the lungs are essentially clear without pleural effusion , pneumothorax , or pulmonary edema . Stable , mild cardiomegaly is noted . The mediastinal and hilar contours are otherwise unchanged .
    OUTPUT:
    
Somewhat improved aeration of the right lower lobe , although the difference in radiographic techniques and the lack of the lateral projection makes the comparison difficult .