Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patchy left basilar opacity raises concern for underlying pneumonia . No pleural effusion or pneumothorax is seen . The cardiac silhouette remains top - normal to mildly enlarged . There is slight prominence of the pulmonary arteries which may be due to a component of underlying pulmonary arterial hypertension . Surgical clips are noted overlying the mediastinum .
    OUTPUT:
    
Patchy left basilar opacity raises concern for underlying pneumonia . Followup to resolution .