Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are several bilateral upper paraspinal surgical clips . Faint amorphous calcifications projecting over the lateral left mid lung likely reflect a calcified pleural plaque . The lungs otherwise clear . Previous bilateral lower lung opacities are significantly improved , however there is persistent left retrocardiac opacity . Heart size is normal . Image somewhat contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Previous bilateral lower lung opacities are significantly improved with some residual opacity especially in the left retrocardiac region suggesting incomplete resolution of pneumonia .