Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is new mild - to - moderate relative elevation of the left hemidiaphragm compared to the prior examination with mild distention of the colon at the splenic flexure projecting immediately beneath the left hemidiaphragm , although not abnormal . Patchy opacity along the left hemidiaphragm appears compatible most likely with atelectasis that might be expected with elevation of the diaphragm . Otherwise , the lungs appear clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No definite evidence of acute cardiopulmonary disease . New elevation of the left hemidiaphragm with patchy opacity at the left lung base , probably due to atelectasis .