Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged but likely similar to prior study given differences in technique . The mediastinal contours demonstrate calcified atherosclerotic disease at the aortic knob and a mildly tortuous aorta , following the curvature of a mildly dextroscoliotic spine . The previously described right mid lung opacity has resolved . In the retrocardiac region , there is increased opacity . There is no large pleural effusion or pneumothorax . Severe degenerative changes are seen in the bilateral glenohumeral joints . Scoliosis and compressive deformities appear likely unchanged .
    OUTPUT:
    
1 . Retrocardiac density may represent atelectasis , but pneumonia is not excluded . 2 . New vague nodular focus in the right lung , possibly a true lung nodule such as primary carcinoma . Evaluation with chest CT is recommended when clinically appropriate .