Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are normal . Lungs are clear except for small nodular opacities measuring less than 3 - mm , relatively dense and most likely consistent with calcified granulomas , suggesting prior granulomatous exposure . Rounded opacities seen on the left between the fourth and fifth ribs , and overlying the right fifth rib , are secondary to buttons overlying the patient seen on the lateral view . No focal consolidations concerning for an acute infection is identified . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormalities identified .