Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , resulting in crowding of bronchovascular structures at the lung bases . Within this context , patchy and linear bibasilar opacities may potentially represent atelectasis , particularly as these findings are less prominent on the lateral view , obtained at a greater degree of inspiration . The cardiomediastinal silhouette is stable since the prior examination . There is central pulmonary vascular congestion . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Probable bibasilar atelectasis . Considering clinical concern for infection , repeat frontal radiograph with improved inspiratory level may be helpful to exclude an early infectious basilar pneumonia .