Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . There is a new area of opacification adjacent to the right heart border which partially obscures the diaphragmatic surface . There is also a retrocardiac opacity , consistent with gastric pull - up and is unchanged since the prior exams . Previously seen left rib calcifications are also unchanged since the prior study . Some linear atelectasis at the left lung base is noted . There is no evidence of pleural effusion , pulmonary edema or pneumothorax .
    OUTPUT:
    
Right lower lung opacification which is most likely atelectasis may also represent aspiration given the presence of gastric pull - up . In the appropriate clinical setting , this could also represent an infectious process . The above findings were communicated to Dr . ___ by Dr . ___ ___ telephone at 14 :00 , five minutes after the finding was discovered .