Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Elevation of the right hemidiaphragm is unchanged compared to the prior CT . Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Linear atelectasis is seen in the right middle lobe . Remainder of the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No radiographic evidence for pneumonia .