Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is focal eventration of the right hemidiaphragm , unchanged compared to the prior study . No pneumothorax or pleural effusion seen . The cardiomediastinal contour is unchanged . The equivocal retrocardiac opacity is similar in appearance when compared to the prior study without definite correlate on the lateral projection . This likely reflects atelectasis .
    OUTPUT:
    
No significant interval change when compared to the prior study .