Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates in the upper SVC . The heart size is normal . Mediastinal and hilar contours are unremarkable . The pulmonary vasculature is not engorged . Streaky linear opacities are seen within the left lung base compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . No nodules or masses are identified . Multilevel degenerative changes are seen within the imaged spine .
    OUTPUT:
    
Subsegmental atelectasis in the left lung base . No acute cardiopulmonary abnormality otherwise demonstrated , and no evidence of intrathoracic metastatic disease .