Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , bilateral alveolar and interstitial opacities appear worsened , however this represents a limited evaluation given change in obliquity and patient 's positioning . There is a moderate right pleural effusion . Underlying pneumonia in the right lung however , can not be excluded . Left hemidiaphragm is not completely visualized , this could be related to increased pleural fluid or due to oblique positioning .
    OUTPUT:
    
Apparent worsening of bilateral alveolar and interstitial opacities which may be related to change in obliquity and change in patient 's positioning . Straight AP chest radiograph would be helpful for a complete evaluation .