Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral chest tubes have been removed . The cardiac , mediastinal and hilar contours appear unchanged including mild suspected cardiomegaly . There are patchy opacities in the mid-to - lower lungs with plate - like and streaky morphologies most suggestive of residual scarring and atelectasis . Fissure are slightly thickened but there is no definite pleural effusion . There is no pneumothorax .
    OUTPUT:
    
Patchy opacities that can probably be explained for the most part by atelectasis or atelectasis ; pneumonia is doubtful , although difficult to entiredly exclude .