Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is at the upper limits of normal , but unchanged . Mild calcification and unfolding of the aorta is present , similar in configuration to the prior study . No CHF , focal infiltrate or effusion is detected . Rounded density measuring approximately ___ .7 mm , at the right base is probably artifact related to the anterior rib end or possibly a calcified granuloma . Incidental note is made of mild curvature of the thoracic spine and background degenerative changes . Slight pleural parenchymal scarring at the right lung apex is unchanged .
    OUTPUT:
    
No acute pulmonary process identified . Question artifact versus calcified granuloma at right lung base .