Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild enlargement of cardiac silhouette . The aortic knob is calcified . Mediastinal and hilar contours are unremarkable . There is mild pulmonary vascular congestion . Focal opacity within the right mid lung field is unchanged from the prior exam , with minimal retrocardiac atelectasis also demonstrated . No pleural effusion or pneumothorax is seen . Old left - sided rib fractures are noted . Extensive degenerative changes are noted in the right shoulder . Diffuse demineralization of the osseous structures is demonstrated with loss of height of a vertebral body at the thoracolumbar junction , unchanged .
    OUTPUT:
    
Persistent focal opacity within the right mid lung field concerning for an infectious process , though if there is no sign of infection , a neoplasm is not excluded . Correlation with Chest CT is recommended . No acute traumatic abnormality otherwise demonstrated .