Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower than on the previous study . This accentuates the size of the cardiac silhouette which is borderline enlarged . Mediastinal and hilar contours are unremarkable . Crowding of the bronchovascular structures is present without pulmonary edema . Patchy opacities are noted in the lung bases , more so on the left , likely reflective of areas of atelectasis . No pneumothorax or pleural effusion is identified . No definite displaced fractures are seen .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .