Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Elevation of the right hemidiaphragm is unchanged , with adjacent linear opacity in the right lung base compatible subsegmental atelectasis . The heart size is normal . Mild atherosclerotic calcification of the aortic arch is re - demonstrated . The mediastinal and hilar contours are unremarkable . Previously noted right PICC has been removed . Left lung is clear , and there is no pulmonary vascular congestion . No pneumothorax or pleural effusion is identified . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
No radiographic evidence for pneumonia . Chronic elevation of the right hemidiaphragm with adjacent right basilar linear atelectasis .