Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . There is minimal left lower lung atelectasis . The lungs are otherwise clear . The heart size is normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . Ovoid opacities overlying both lung bases on the frontal projection correspond to the patient 's nipples and should not be confused with pulmonary nodules .
    OUTPUT:
    
No acute cardiac or pulmonary process .