Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , there is new opacification of the right mid and lower zones , likely reflecting a moderately large , right effusion , with underlying collapse and / or consolidation and obscuration of the right hemidiaphragm . The right heart border is also obscured . There is vascular plethora in the right upper zone which may be secondary to compressive atelectasis . No pneumothorax is detected . A single surgical clip or fiducial is seen at the right lung base medially , with note made of interval change in position . The cardiomediastinal silhouette remains grossly midline and , where visible , is similar to the prior study . The left lung is grossly clear , without CHF or frank consolidation . There is minimal atelectasis / scarring at the left lung and possible slight blunting of left costophrenic angle , similar to the prior study .
    OUTPUT:
    
New opacification of right mid and lower zones , likely reflecting the presence of pleural fluid . The extent of any underlying atelectasis , infection , tumor , and the position of the right hemidiaphragm is difficult to assess on this examination . The degree of opacification is also new compared with a chest CT from ___ . Vascular plethora in the right upper zone , without evidence of CHF in the left lung , likely secondary to compressive atelectasis . Left base atelectasis and minimal left minimal blunting of left costophrenic angle is not significantly unchanged .