Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left Port - A - Cath is in unchanged position in the mid SVC . The previously identified linear region of opacity in the right middle lobe has slightly improved ; however , there is new increased opacity in the left lower lung . For a detailed discussion of the patient 's prior radiographs , see dictation of chest radiograph from ___ . The patient appears to have waxing and waning opacities that may represent atelectasis . The cardiomediastinal silhouette is normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
New left lower lung opacity may represent atelectasis or consolidation . Findings discussed with Dr . ___ by Dr . ___ at 12 :30 on ___ , ___ min after discovery .