Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable and lateral views of the chest are provided . Plate - like lower lung atelectasis is noted bilaterally . The heart appears mildly enlarged , but this could be technique - related . No definite signs of pneumonia or CHF . No pleural effusion is seen . Mediastinal contour reflects an unfolded thoracic aorta , also seen on prior CT . Anterior spurring is seen anteriorly in the thoracic spine . No free air below the right hemidiaphragm .
    OUTPUT:
    
Low lung plate - like atelectasis . No pneumonia .