Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are unchanged compared to the prior study with persistent moderate bibasal pleural effusions and associated atelectasis . There are coarse interstitial markings bilaterally which may reflect interstitial pulmonary edema in this setting . The patient 's known pulmonary nodules are difficult to visualize on today 's study . The visualized bony structures the spine are densely sclerotic consistent with metastatic disease . Oral contrast material is noted in the colon .
    OUTPUT:
    
Persistent moderate bilateral pleural effusions with associated atelectasis . Superimposed infection can not be excluded . Coarse interstitial markings may reflect a degree of fluid overload .