Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low with crowding of the vascular structures . At the right base there is a linear opacity most consistent with linear atelectasis . This is stable from the prior chest radiograph on ___ . There is opacification of the left base , which appears slightly more dense than on the prior radiograph . It is likely due to chronic aspiration , although a new event or underlying infection can not be excluded . There is no definite pleural effusion , although the left costophrenic angle is not well evaluated due to opacity , and a small pleural effusion may be present . There is no pneumothorax . The cardiomediastinal silhouette is normal . Atherosclerotic calcifications are noted within the aortic arch .
    OUTPUT:
    
1 . Slightly worsening of the left basilar opacity may be secondary to chronic aspiration , although a new aspiration event or underlying pneumonia can not be excluded . A small pleural effusion on the left may be present . Further evaluation with PA and lateral images would be helpful for further evaluation if / when patient able . 2 . Stable right basilar atelectasis .