Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta is diffusely calcified and mildly tortuous . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Patchy opacities at the right base are likely atelectasis . There is minimal pleural thickening at the right base , similar in appearance to the prior studies . A granuloma at the apex of the left lung is unchanged . Otherwise the left lung is clear . No evidence of pneumothorax or pleural effusion .
    OUTPUT:
    
Patchy opacities at the right base most likely represent atelectasis . Chronic right basal pleural thickening .