Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , which accentuate the bronchovascular markings . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . No definite displaced rib fracture is identified , however , this study is low in the sensitivity of detection of such .
    OUTPUT:
    
Low lung volumes which accentuate the bronchovascular markings . No definite rib fracture identified , however , if clinical concern remains high , dedicated rib series or chest CT is more sensitive .