Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiographs demonstrate low lung volumes . Subtle nodular opacities at the left upper lobe are present as demonstrated on prior radiograph . The right lung is clear . Bibasilar atelectasis is present . There is no large pleural effusion or overt pulmonary edema . The heart is stably enlarged . A right sided dialysis catheter is in stable position .
    OUTPUT:
    
Subtle nodular opacities in the left upper lobe persist in is patient concerning for an early infectious process . Stable cardiomegaly without overt pulmonary edema . Low lung volumes with bibasilar atelectasis .