Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Mild interstitial pulmonary edema is present . Compared with prior chest radiograph there is a new confluent opacity in the right lower lung , obscuring some portions of the right hemidiaphragm margin . The left lung is clear . There may be a small layering pleural effusion in the right and chronic pleural thickening is redemonstrated . There is no evidence of pneumothorax . Severe S type scoliosis is again seen and not significantly changed from prior . Cardiac size can not be assessed in this AP view but appears stable compared with ___ .
    OUTPUT:
    
New right lower lobe opacity compatible with pneumonia vs atelectasis . Mild interstitial pulmonary edema unchanged from prior .