Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes remain low . Hazy opacification of the right lung base likely reflects a layering small - to - moderate right pleural effusion . No significant pneumothorax or left pleural effusion . There is mild pulmonary vascular congestion without overt pulmonary edema . Right basilar atelectasis is longstanding . No definite focal consolidation is seen . A tracheostomy tube is in place . Mild - to - moderate cardiomegaly is unchanged . Increased prominence of the mediastinum is related to patient positioning and tortuosity of the aorta .
    OUTPUT:
    
1 . Unchanged small - to - moderate right pleural effusion and underlying atelectasis . 2 . Mild pulmonary vascular congestion .