Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is no focal consolidation , pleural effusion or pneumothorax . Blunting of the right costophrenic sulcus with flattening of the right hemidiaphragmatic contour is unchanged since at least ___ , likely pleural thickening from prior effusion or infection . Cardiac silhouette and mediastinal and hilar contours are normal .
    OUTPUT:
    
No acute intrathoracic process .