Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Severe cardiomegaly with mediastinal vascular pedicle engorgement and mild pulmonary edema . No large pleural effusion . Right lower lobe opacity .
    OUTPUT:
    
1 . Mild congestive heart failure . 2 . Right lower lobe opacity may represent atelectasis or pneumonia . Conventional PA and lateral chest radiographs are recommended to further evaluate .