Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Low lung volumes significantly limit the assessment . There is normal ray shin of the mid upper lungs . The lower lungs can not be assessed heart size can not be assessed . No large effusion is or pneumothorax is seen . Bony structures are grossly intact .
    OUTPUT:
    
Limited exam due to markedly low lung volumes . No overt abnormality . Please repeat with more optimized inspiratory effort for a more complete assessment .