Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Bibasilar atelectasis again noted . No convincing sign of free air . Cardiomediastinal silhouette appears grossly unchanged . No definite pneumothorax or effusion . Bony structures are intact . Gas-filled loops of bowel noted in the upper abdomen .
    OUTPUT:
    
Bibasilar atelectasis . Gas-filled distended bowel loops in the upper abdomen , likely reflect known ___ 's pseudo -obstruction though clinical correlation is advised .