Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hypoinflated with crowding of vasculature . No focal opacity . No pleural effusion or pneumothorax . Mildly prominent mediastinum is likely related to patient positioning . Heart size , mediastinal contour , and hila are otherwise unremarkable .
    OUTPUT:
    
1 . Mildly prominent mediastinum since ___ is likely related to patient positioning . 2 . No pneumonia or pulmonary edema . 3 . Mildly hypoinflated lungs .