Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Relatively low lung volumes are seen . There is secondary crowding of the bronchovascular markings with possible superimposed pulmonary vascular engorgement . Cardiac silhouette appears enlarged , but likely accentuated by technique and low lung volumes . Hypertrophic changes are noted in the spine . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
No definite focal abnormality . Low lung volumes with possible superimposed vascular congestion .