Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal with mild tortuosity of the thoracic aorta . Mediastinal silhouette and hilar contours are unchanged . Subtle heterogeneous consolidation at the right posterior lung base is suspicious for pneumonia . The remainder of the lung fields are clear . There is no pleural effusion or pneumothorax . Mild compression deformity of the T7 vertebral body is unchanged from ___ .
    OUTPUT:
    
Subtle heterogeneous opacity at the right posterior lung base which could represent either atelectasis or pneumonia .