Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is enlarged and is accompanied by mild pulmonary vascular congestion . Linear opacities at the lung bases are suggestive of linear atelectasis and / or scarring . On the lateral view , a slightly more focal opacity is present in the left lower lobe , partially obscuring the posterior left hemidiaphragm in the region of the lower thoracic spine . Probable very small bilateral pleural effusions .
    OUTPUT:
    
1 . Cardiomegaly and mild pulmonary vascular congestion . 2 . Focal left lower lobe opacity , which may be due to either atelectasis or focal pneumonia .