Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal heart size . The right hilum is normal and the left hilum is not well seen . Convexity of the right upper mediastinal border may reflect mild azygos distension due to volume overload or an enlarged right lower paratracheal lymph node . Lungs are clear . No pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Left hilum is suboptimally evaluated on the current study . Recommend conventional PA and lateral radiographs for further evaluation . 2 . Convexity of the right upper mediastinal border may reflect mild azygos distension or an enlarged right lower paratracheal lymph node . This would be better evaluated on conventional PA and lateral radiographs .