Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright semi-portable views of the chest were obtained . Heart is normal in size and cardiomediastinal contour is stable . Increased bilateral opacities likely relate to accentuated pulmonary vasculature due to low lung volumes . There is no focal consolidation . There is central venous engorgement , but no pulmonary edema . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes , accentuating pulmonary vascular markings ; no pulmonary edema or consolidation .