Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Exam is limited due to underpenetration . Pulmonary vascular congestion and cephalization with mild bibasilar atelectasis is present , compatible with history of CHF . Right middle lobe atelectasis is present . The lungs remain hyperinflated . No large effusions , focal consolidation , or pneumothorax .
    OUTPUT:
    
Mild pulmonary vascular congestion . Overall , no substantial change since ___ .