Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation is limited due to patient 's positioning . The heart is enlarged . Increased density at the right lung base is consistent with a pleural effusion . There is likely persistent left base atelectasis .
    OUTPUT:
    
Right pleural effusion , however limited evaluation due to patient positioning . For a more thorough evaluation , repeat examination is recommended in a more symmetric position .