Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is enlarged , but there is no evidence of congestive heart failure . Lungs are clear except for minimal linear atelectasis at the left base . A questionable small left pleural effusion is noted , but there is no evidence of pneumothorax .
    OUTPUT:
    
1 . Cardiomegaly without evidence of CHF . 2 . Minor left basilar atelectasis and questionable small left pleural effusion .