Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal upright and lateral chest radiographs demonstrate well - expanded lungs bilaterally . Diffusely increased interstitial markings most notable at the lower lungs suggesting chronic interstitial lung disease , have not significantly changed , and there is no focal area of consolidation . Heart is normal in size . Calcifications are noted in the aortic arch . A cardiac stent is identified on the lateral view . Mild blunting of the right costophrenic angle has not significantly changed over multiple prior studies , suggesting a small right pleural effusion .
    OUTPUT:
    
1 . Stable small right pleural effusion . 2 . No evidence of pneumonia