Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since 1 day prior , lung volumes are somewhat improved , but left basilar atelectasis is increased and a small left pleural effusion is essentially unchanged . Lateral left rib fractures are unchanged . No pneumothorax . Mild cardiomegaly is unchanged . No pulmonary vascular congestion or pulmonary edema .
    OUTPUT:
    
Increased left basilar atelectasis , but unchanged , small left pleural effusion and unchanged rib fractures with no pneumothorax .