Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear similar , allowing for differences in technique . There is a persistent opacity along the left lower lung , probably within the lingula , but improved somewhat . Opacities in the right mid and lower lungs persist with little if any definite change , allowing for differences in technique . The chronicity of these is uncertain . Moderate rightward convex curvature is centered along the lower thoracic spine .
    OUTPUT:
    
Persistent right lung opacities ; improving dominant opacity in the left lower lung . Follow - up radiographs are suggested to show resolution .