Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lung volumes are markedly low with lower lung atelectasis and bronchovascular crowding . There is no large effusion or pneumothorax . No overt edema . Heart size can not be assessed . Mediastinal contour appears stable . Bony structures are intact .
    OUTPUT:
    
Limited due to low lung volumes . No convincing signs of pneumonia or overt CHF . Mild edema difficult to exclude .