Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small left pleural effusion is new since ___ . Diffuse coarsening of the interstitium is most prominent in the right lower lobe . Otherwise , the lungs are clear without focal opacity , overt pulmonary edema or pneumothorax . The aortic knob is calcified . Moderate cardiomegaly is stable .
    OUTPUT:
    
1 . A small left pleural effusion is new since ___ . 2 . Diffuse coarsening of the interstitium , most predominant in the right lower lobe could represent interstitial edema or chronic interstitial disease .