Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low , but given this , there is no evidence of opacities to suggest infection . There is no pleural effusion or pulmonary edema . The heart size is normal . The mediastinal contours are unremarkable . A right sided cervical rib is incidentally noted .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .