Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left subclavian central venous catheter tip terminates in the SVC . Cardiac , mediastinal and hilar contours are within normal limits , with mild aortic arch calcifications . Subsegmental atelectasis is most pronounced in the lung bases . Hazy focal opacity is noted at the confluence of the left first anterior rib with the left fifth posterior rib , which appears unchanged , and no discrete nodular opacity was seen on the prior CTA of the chest from ___ . No pleural effusion or pneumothorax is seen . There is diffuse demineralization of the osseous structures , with unchanged posterior fusion hardware in the thoracic spine spanning two adjacent compression deformities .
    OUTPUT:
    
Bibasilar subsegmental atelectasis . No acute cardiopulmonary abnormality .