Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left retrocardiac opacity has been cleared up since prior chest x-ray . New vague patchy opacities in the mid right lung are new since prior examination , might be initial consolidation . Follow - up chest x-ray is suggested . Lung is otherwise clear . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is unchanged with mild cardiomegaly .
    OUTPUT:
    
Resolution of left retrocardiac lung opacity . Right upper lung opacities are new and should be followed with serial chest x-ray .