Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable view of the chest was provided . There is scarring in the right mid - to - lower lung with pleural thickening , similar to prior CT scan . Pleural thickening and scarring at the left lung base is also similar to prior , likely accounting for the blunted appearance of the bilateral CP angle . Cardiomediastinal silhouette appears normal . No definite signs of pneumonia or CHF . No pneumothorax . There is an old deformity of the left clavicular mid shaft . No acute bony abnormalities .
    OUTPUT:
    
Stable scarring in the lungs as better assessed on prior CT chest . No definite signs of superimposed pneumonia .