Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a similar right upper paramediastinal mass as well as a right perihilar mass , compared to prior radiographs , although small differences would be difficult to evaluate and would be better followed by CT imaging . The heart is at the upper limits of normal size . There is similar mild relative elevation of the right hemidiaphragm compared to the left . Although patchy opacities are present in the lower lungs , these are vague and streaky , most suggestive of minor atelectasis . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
No definite evidence of acute disease .