Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Rotated positioning . There are low inspiratory volumes . Heart size is borderline , but unchanged . Aorta is calcified and unfolded . Mild prominence of vascular markings , but doubt overt CHF . No focal opacity , frank consolidation , or gross effusion is identified . No pneumothorax is detected . Focal rounded opacity in the left suprahilar region most likely represents confluence of vascular and osseous shadows . Attention to this area on followup films is requested . No displaced rib fracture identified on these lung technique films .
    OUTPUT:
    
Cardiomediastinal silhouette unchanged . No pneumothorax detected . No obvious rib fractures , though nondisplaced rib fracture could be occult , particularly on these lung technique films . Mild vascular plethora , but doubt overt CHF . No focal consolidation or effusion detected . Focal density left suprahilar region likely represents confluence of vascular and osseous shadows . Attention to this area on followup films is requested .