Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky left lower lobe opacities are likely related to atelectasis and low lung volumes . Cardiac size is normal . Pacemaker with 2 leads terminating appropriate positions is present . The aorta is tortuous . Slight deviation of the trachea is unchanged finding . There are no pleural effusions .
    OUTPUT:
    
Low lung volumes , but no evidence of acute intrathoracic process .