Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacities in the lung bases likely reflect areas of subsegmental atelectasis . The remainder of the lungs appear clear . There is no pneumothorax . Blunting of the right costophrenic angle corresponds with a known small pleural effusion . There is no pulmonary edema or vascular congestion . Mediastinal and hilar contours are within normal limits . Mild cardiomegaly is unchanged from prior . Mild elevation of the right hemidiaphragm is unchanged compared to multiple recent prior examinations .
    OUTPUT:
    
1 . Unchanged mild elevation of the right hemidiaphragm compared to multiple recent priors . 2 . Stable small right pleural effusion and bibasilar atelectasis . 3 . Unchanged mild cardiomegaly