Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable chest radiograph demonstrates unremarkable mediastinal , hilar and cardiac contours . Rounded opacity projecting over the right upper lung adjacent to anterolateral fourth rib deformity may reflect sequaelae of trauma . Known acute left lower limb fracture is not well appreciated on current study . No pleural effusion or pneumothorax is evident .
    OUTPUT:
    
Opacity projecting over right upper lung with adjacent rib deformity may reflect prior injury . Recommend re-evaluation in 6 weeks to assess for resolution .