Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a non-characteristic opacity in the left retrocardiac and left base area . The right basilar atelectasis and pleural effusion continue to improve . The remainder of the exam is stable including stable position of support and monitoring devices .
    OUTPUT:
    
1 . Non-characteristic left retrocardiac opacity likely representing atelectasis . 2 . Improvement of right - sided pleural effusion and atelectasis .