Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . As seen previously , there is the unchanged right upper lobe with scarring which is stable in appearance . There is a small right pleural effusion which is unchanged . The left lung is clear . Hyperinflated lungs reflect underlying COPD . There is no superimposed pulmonary edema or new opacity . The cardiomediastinal silhouette is stable . Old left rib deformities are noted . Bones appear demineralized diffusely .
    OUTPUT:
    
No acute findings . Stable right pleural effusion and right upper lobe scarring .