Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable semi-erect chest radiograph was obtained . Lung volumes are mildly decreased . An opacity projecting over the right base has a sharp lateral border consistent with atelectasis . No additional focal consolidation , effusion , or pneumothorax is present . Cardiac and mediastinal contours are normal . Incidental note is made of the splenic flexure appearing immediately under the left hemidiaphragm .
    OUTPUT:
    
New right basilar atelectasis .