Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Hyperinflated lungs are consistent with obstructive disease . There is no focal consolidation , effusion , or pneumothorax . No pulmonary vascular congestion or pulmonary edema . Mediastinal and hilar contours are normal . Mild cardiomegaly is unchanged . No definite rib fracture is identified . There is moderate calcification of the aortic knob .
    OUTPUT:
    
1 . No pulmonary edema or evidence of cardiac decompensation . 2 . No definite rib fracture identified . If clinical concern persists , recommend oblique dedicated rib views for further evaluation . 3 . Hyperinflated lungs are consistent with obstructive disease . 4 . Mild cardiomegaly .