Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal contours are unremarkable . Hilar contours are prominent suggestive of underlying pulmonary arterial enlargement . Relative paucity of pulmonary vascular markings towards the apices indicates underlying emphysema . Streaky and patchy opacities are seen within the right mid lung field of both lung bases , potentially areas of atelectasis and / or infection . No large pneumothorax or pleural effusion is detected on this supine exam . Multiple bilateral rib fractures are noted , potentially related to recent resuscitation .
    OUTPUT:
    
Emphysema and probable underlying pulmonary arterial hypertension . Patchy opacities within the right mid lung and both lung bases , potentially atelectasis and / or infection . Multiple bilateral rib fractures which may be related to recent resuscitation , without large pneumothorax identified .