Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with the prior study , there is opacification at the left lung base , obscuring the hemidiaphragm , consistent with a pleural effusion and left lower lung volume loss . There is no focal consolidation concerning for pneumonia , or pneumothorax . No change in the old healed right rib fracture .
    OUTPUT:
    
New left pleural effusion with left lower lung volume loss .