Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates low lung volumes , accentuating cardiomediastinal silhouette . Patchy opacity in the right base is more pronounced on current exam as compared to prior radiograph dated ___ , but present on prior CTs dating back to ___ , suggestive of chronic consolidation or volume loss at this location . The left and upper right lung are clear . There is no pneumothorax , pulmonary vascular congestion , or pleural effusion .
    OUTPUT:
    
Chronic right basilar consolidation and / or atelectasis . No new consolidation to suggest pneumonia .