Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrates heart size upper limits of normal . Pulmonary vasculature is within normal limits . There is no evidence of pulmonary edema . Blunting of the left costophrenic angle appears similar to prior study , may reflect pleural thickening or atelectasis . Previously described subtle right basilar opacity is less apparent on current examination . No new focal opacity is seen . There is no air under the right hemidiaphragm .
    OUTPUT:
    
No new focal opacity convincing for pneumonia . Previously described right basilar opacity on radiograph dated ___ is less apparent on current examination .