Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Exam is suboptimal secondary to positioning and rotation . Increased opacity seen at the lung bases confirmed on the lateral view . Superiorly the lungs are clear . Cardiomediastinal silhouette is stable . Bones are diffusely demineralized . Compression deformities in the thoracic and lumbar spine were seen on prior . High density material projects over the renal collecting systems bilaterally compatible with excreted contrast from recent CT scan .
    OUTPUT:
    
Bibasilar opacities , potentially in part due to atelectasis although infection or aspiration would also be possible .