Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly reduced . Heart size is mildly enlarged . Aortic knob is calcified . Mediastinal and hilar contours are unchanged with prominence of the pulmonary arteries , better seen on the prior study , compatible with underlying pulmonary arterial hypertension . Attenuation of the pulmonary vascular markings towards the lung apices is compatible with emphysema , as seen on the prior chest CTA . Mild pulmonary vascular congestion persists . Increased interstitial opacities are noted predominantly involving the lower lobes , and likely reflective of the patient 's chronic interstitial lung disease . Blunting of the left costophrenic angle likely reflects a trace left pleural effusion , not significantly changed from the prior exam . There is no pneumothorax .
    OUTPUT:
    
1 . Persistent mild pulmonary vascular congestion and small left pleural effusion . 2 . Basilar predominant chronic interstitial lung disease . Emphysema .