Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation is limited by body habitus . There is a tracheostomy in similar position . Lung volumes are low causing accentuation of the central bronchovascular structures . The heart is enlarged , and there is no pulmonary edema . The lungs are clear without focal consolidation , pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Cardiomegaly . 2 . If clinical concern for positioning of the tracheostomy , a lateral chest radiograph would be helpful .