Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are compared to the previous exams from ___ and ___ . There are low lung volumes resulting in accentuation of the pulmonary vasculature . The presence of interstitial edema , focal consolidation or aspiration is difficult to discern given the low lung volumes . Increased interstitial markings are unchanged compared to the prior exams . The cardiomediastinal silhouette is enlarged , however is unchanged compared to the prior study . No bony abnormalities . No free air below the right hemidiaphragm .
    OUTPUT:
    
Mild pulmonary interstitial edema can not be excluded . Limited exam due to low lung volumes .