Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . There is elevation of the left hemidiaphragm , similar to prior . Left basilar opacity could represent atelectasis , although consolidation or effusion are also possible . The lungs are otherwise clear . Massive dilation of the pulmonary arteries is stable in configuration . Cardiac silhouette is enlarged but similar compared to prior . Orthopedic hardware partially visualized in the proximal right humerus .
    OUTPUT:
    
Left basilar opacity due to any combination of effusion , atelectasis or underlying infection . Massive dilation of the pulmonary arterial tree similar to prior .