Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP view of the chest . Low lung volumes are seen with secondary crowding of the bronchovascular markings . Cardiomediastinal silhouette accentuated due to portable technique and low lung volumes but is likely within normal limits . No definite acute osseous abnormality identified . Orthopedic screws seen in the left femoral head .
    OUTPUT:
    
No definite acute cardiopulmonary process .