Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable semi-upright view of the chest was provided . There is left lung base opacification which could represent a combination of effusion and atelectasis though pneumonia can not be excluded . A trace right pleural effusion is also seen . There is mild interstitial congestion . Heart size is difficult to assess . Atherosclerotic calcifications along the aortic knob noted . Patient is slightly rotated to his left somewhat limiting the evaluation . No pneumothorax . The imaged osseous structures appear intact .
    OUTPUT:
    
Consolidation at the left lung base could represent atelectasis and / or pneumonia with moderate left and small right pleural effusion . Mild pulmonary vascular congestion also noted .