Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated . Bibasilar linear atelectasis is noted . Retrocardiac opacity is likely related to gastric pull through , but previously seen superimposed pulmonary consolidation can not be optimally evaluated for without a lateral view . Mild cardiomegaly and aortic tortuosity are unchanged . The cardiomediastinal and hilar contours are unremarkable otherwise . There is no pleural effusion or pneumothorax . Again seen are three bone islands projecting over the anterior left second rib .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Previously seen retrocardiac opacity not optimal evaluated without a lateral view .