Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aortic knob is calcified . Mediastinal and hilar contours are unremarkable . Previous pattern of pulmonary vascular congestion has improved . There are minimal linear streaky opacities in both lung bases likely reflective of atelectasis . No pleural effusion , focal consolidation or pneumothorax is identified . There are degenerative changes in the right glenohumeral and acromioclavicular joints . No acute osseous abnormality is identified .
    OUTPUT:
    
Interval improvement in previous pattern of pulmonary vascular congestion . Mild bibasilar atelectasis .