Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Elevation of the right hemidiaphragm is unchanged . There is probably a trace right pleural effusion . No focal consolidation , effusion , edema , or pneumothorax . Moderate cardiomegaly is overall unchanged . Aortic knob calcifications are unchanged . Multilevel degenerative changes of the thoracic spine are mild . No acute osseous abnormality .
    OUTPUT:
    
No focal pneumonia . Probable trace right pleural effusion .