Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable view of the chest . A left - sided pacemaker is in place with leads in appropriate position . There is mild cardiomegaly with mild pulmonary vascular congestion . A vague retrocardiac opacity is seen , may represent atelectasis or pneumonia . No pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion . 2 . Vague retrocardiac opacity may represent atelectasis or pneumonia . PA and lateral views may be obtained for better visualization