Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mildly enlarged . Mild basilar opacity is seen on the frontal view , likely representing atelectasis . A dual lead pacemaker is noted , with 1 lead in the right atrium and 1 lead in the right ventricle . A small , age - indeterminate left pleural effusion is noted .
    OUTPUT:
    
1 . No acute intrathoracic abnormality . 2 . Age-indeterminate left pleural effusion .