Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates at the cavoatrial junction . The cardiac , mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . The chest is hyperinflated . There is a new patchy posterior left lower lobe opacity , highly nonspecific . There is no definite pleural effusion or pneumothorax . Moderate anterior osteophytes are present along the mid to lower thoracic spine . The bones are probably demineralized to some degree . Cholecystectomy clips project over the right upper quadrant .
    OUTPUT:
    
New focal left lower lobe opacity ; although morphological characteristics are somewhat suggestive of atelectasis , pneumonia could also be considered .