Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no pleural effusion or pneumothorax . Cardiomediastinal and hilar silhouettes are normal size . Mild opacity is identified in the medial right lung base on frontal view obscuring the right cardiac silhouette is likely due to superimposed pulmonary vessels . Mild pleural thickening is noted in the posterior left or right lung base on the lateral view .
    OUTPUT:
    
No radiographic evidence of pneumonia is identified .