Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low with bronchovascular crowding . A right Port - A - Cath tip ends in the low SVC . No focal consolidation , effusion , edema , or pneumothorax . The heart size is normal . Mediastinal contours are overall unchanged . Multilevel degenerative changes of thoracic spine are again seen .
    OUTPUT:
    
Slightly low lung volumes . No evidence of an acute intrathoracic process .