Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal supine view of the chest was obtained portably . Lung volumes are very low , resulting in bronchovascular crowding . There is no focal consolidation , pleural effusion or large pneumothorax . Cardiac and mediastinal silhouettes are stable from the most recent prior . No displaced rib fracture is identified .
    OUTPUT:
    
No evidence of intrathoracic trauma . Note , conventional radiography is not the best study to evaluate for chest cage injury . If there are focal findings , detailed views of those areas should be obtained with consideration for CT if clinically indicated .