Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is accentuated as a result , and appears borderline enlarged . Mediastinal and hilar contours are unremarkable with mild atherosclerotic calcifications seen at the aortic knob . Crowding of the bronchovascular structures is demonstrated . No pulmonary edema is seen . Minimal atelectasis is noted at the lung bases without focal consolidation , pleural effusion or pneumothorax . There are moderate multilevel degenerative changes seen in the thoracic spine as well as involving the right glenohumeral and acromioclavicular joints .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .