Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior study , there is negligible interval change . The right subclavian PICC line tip lies slightly higher , over the distal SVC . The previously seen punctate opacities at the left - greater - than - right bases appear slightly less pronounced at the left base , but are likely actually unchanged . These have been attributed to chronic punctate calcifications in the lung bases , possibly sequela of previous interstitial pneumonitis at a time of renal insufficiency ( based on ___ chest CT ) . The cardiomediastinal silhouette is unchanged . No CHF , focal infiltrate or consolidation , or effusion is identified . Within the limits of plain film radiography , no hilar or mediastinal lymphadenopathy is detected . A mesh stent overlies the inner portion of the left arm
    OUTPUT:
    
1 . No acute pulmonary process identified . 2 . Punctate calcifications at the lung bases are a chronic finding and are likely unchanged .