Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . Left PICC terminates in the distal SVC . Otherwise , the lungs are well expanded and with linear retrocardiac opacities most compatible with atelectasis . There is no pleural effusion or pneumothorax . Heart is normal in size with normal mediastinal contours .
    OUTPUT:
    
Linear left basal atelectasis .