Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multiple known bilateral pulmonary metastases are better delineated on the previous dedicated chest CT . There is increased opacification of the left lung base consistent with atelectasis in the region of known metastatic disease . A right - sided port is noted with the catheter tip in lower SVC . Another catheter is no is noted projecting over the left portion of the sternum and likely external . Heart remains minimally and mildly enlarged .
    OUTPUT:
    
Known bilateral pulmonary metastatic disease with no evidence of focal pneumonia . Left lower lobe opacity is representative of atelectasis .