Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs again demonstrate mild cardiomegaly and vascular redistribution , with somewhat asymmetric opacity in the right upper lung unchanged over multiple chest radiographs dating back to ___ . Faint opacity in the left lung base is without correlate on lateral view , likely representing atelectasis . There is no pleural effusion or pneumothorax . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
No focal consolidation . Asymmetric opacity in the right upper lung is unchanged dating back to ___ . Left base atelectasis .