Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate low lung volumes , which results in bronchovascular crowding . The heart appears enlarged , which may represent cardiomegaly or pericardial effusion . There is no pneumothorax , pleural effusion , or focal consolidation . Patchy opacity at the medial right base likely reflects atelectasis in the setting of low volume related to elevated right hemidiaphragm .
    OUTPUT:
    
1 . The heart appears enlarged , which may represent cardiomegaly or pericardial effusion . 2 . No evidence of pleural effusion .