Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Heart size is normal . Pulmonary vasculature is not engorged . No focal consolidation , pleural effusion or pneumothorax is visualized . Minimal atelectasis is demonstrated in the lung bases . No pleural effusion or pneumothorax is demonstrated . A BB marker is seen indicating the site of the patient 's tenderness overlying the region of the left ninth posterior rib . Minimal cortical irregularity is seen involving the left ninth and tenth ribs posterolaterally which could reflect nondisplaced fractures .
    OUTPUT:
    
Minimal cortical irregularity of the left ninth and tenth ribs posterolaterally which could reflect nondisplaced fractures . No pneumothorax or pleural effusion . Minimal bibasilar atelectasis .