Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior radiograph on ___ , the lungs appear better aerated . The tracheostomy tube is unchanged in position . Right apical opacification along with a calcified granuloma is unchanged since ___ , which is the earliest chest imaging available to us . There are also bibasilar opacities which are not significantly changed from the prior exam , and are likely due to a combination of pleural effusion and atelectasis . Stable mild cardiomegaly . There is a moderate amount of free air under the right hemidiaphragm which has slightly improved since the prior radiograph . The feeding tube is out of view on this CXR .
    OUTPUT:
    
1 . The lungs are better aerated compared to the prior exam . 2 . Moderate pneumoperitoneum , improved from the prior exam .