Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , Overall lung volumes are decreased . The lungs are clear without focal consolidation . The mediastinal contour is slightly increased compared with prior , although remains within normal limits , likely representing increased intravascular volume . There is no pulmonary edema or effusion . No Pneumothorax .
    OUTPUT:
    
Overall decreased lung volumes . No pneumonia .