Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen right lower lobe pneumonia has resolved with insignificant residual opacity . There are no new areas of focal consolidation . The lungs are well expanded and clear with no mass lesion , pleural effusion or pneumothorax . Cardiomediastinal silhouette demonstrates mildly tortuous aorta , but is otherwise normal . Three collinear rounded opacities are seen projecting over the lateral left upper lung zone at the level of the aortic arch , found to be bone islands of the second and third left anterior ribs . Moderate multilevel degenerative changes of the thoracic spine are noted .
    OUTPUT:
    
Radiographic resolution of previously diagnosed pneumonia . No further followup is required .