Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest provided demonstrate clear lungs , though lung volumes are low . The heart size is grossly stable , though lung volumes limit evaluation . Mediastinal contour is unremarkable . No pneumothorax or pleural effusion . Bony structures are intact .
    OUTPUT:
    
Limited exam due to low lung volumes without acute intrathoracic process .