Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Aorta remains mildly tortuous . Pulmonary vascularity is normal . Mediastinal contours are stable . No pulmonary vascular congestion is noted . At least 3 nodular opacities are seen , 2 within the right upper lobe , and one within the left upper lobe , which were present on the prior CT torso . Other smaller pulmonary nodules seen on the CT are not clearly demonstrated on the current exam . Blunting of the costophrenic angle on the left posteriorly suggests a small left pleural effusion , new from the prior exam . No pneumothorax is identified . There is diffuse demineralization of the osseous structures .
    OUTPUT:
    
1 . Small left pleural effusion . 2 . Bilateral pulmonary nodules , better demonstrated on the prior CT , compatible with known metastatic lesions .