Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . There is chronic opacity at the left costophrenic angle known to at least be in part due to rounded atelectasis with possible superimposed effusion , and has not significantly changed . The remainder of the lungs are grossly clear . Cardiomediastinal silhouette is stable . Old healed mid left clavicular fracture is again seen .
    OUTPUT:
    
No definite acute cardiopulmonary process .