Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no pleural effusion , pneumothorax or focal airspace consolidation to suggest pneumonia . Cardiac and mediastinal contours are normal . The hilar structures are unremarkable . A pleural - based opacity in the left upper lung is unchanged and may represent a focus of pleural thickening or an extrapleural lipoma . There is no acute osseous abnormality . There has been no change from the prior exam .
    OUTPUT:
    
No acute cardiopulmonary process .