Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are reviewed and compared to the prior study . Low lung volumes persist . Moderate bilateral pleural effusions with underlying bibasilar atelectasis are unchanged . Cardiomegaly and a calcified mitral valve ring are unchanged .
    OUTPUT:
    
1 . Unchanged moderate bilateral pleural effusions with underlying bilateral atelectasis . 2 . Unchanged cardiomegaly .