Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral images of the chest were obtained . The lungs are well expanded . The right heart border is partially obscured by a diaphragmatic hump . Small right upper lobe nodule is again seen on this exam unchanged from previous imaging . There is a small left pleural effusion . There is no pneumothorax . Visualized osseous structures are unremarkable .
    OUTPUT:
    
Small left pleural effusion . No evidence of acute decompensated heart failure .