Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal AP view of the chest was obtained portably . Low lung volumes result in bronchovascular crowding . There is no focal consolidation , pleural effusion , or pneumothorax . Heart size is normal allowing for low lung volumes and technique . Mediastinal silhouette and hilar contours are within normal limits . No displaced rib fracture is identified . There is no free air under the diaphragm .
    OUTPUT:
    
No acute intrathoracic process allowing for lung volumes .