Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Inspiratory volumes are slightly low . There is background COPD . There are bilateral calcified pleural plaques , weight can obscure underlying pulmonary parenchyma . There is mild cardiomegaly , with a calcified unfolded aorta , likely unchanged , allowing for technical differences . Prominence of the hila , with a tapered appearance , is suggestive of pulmonary hypertension , unchanged . There is upper zone redistribution , without overt CHF . There is new patchy opacity at the left base . Minimal opacity in the right cardiophrenic region is not clearly changed . No gross effusion is identified .
    OUTPUT:
    
1 . New patchy opacity in the retrocardiac region , which could represent an early infectious infiltrate in the left lower lobe . 2 . Calcified pleural plaques and other chronic parenchymal changes , again noted . 3 . Mild cardiomegaly , upper zone redistribution , and hilar prominence suggestive of pulmonary hypertension , unchanged .