Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior chest radiograph , lung volumes are slightly lower , causing crowding of bronchovascular structures . Heart size , mediastinum , and hilar contours are unchanged . Except for mild bibasilar atelectatic changes , lungs are clear without pleural effusions , focal consolidation , or pneumothorax . Small linear hyperdensity projecting over the left upper abdominal quadrant has no correlate on the lateral view , and may be a surgical clip or outside the patient . No acute fracture identified . Severe degenerative change of the left glenohumeral joint appears slightly worse . Moderate right glenohumeral joint degenerative disease is unchanged . No fracture identified .
    OUTPUT:
    
1 . No focal consolidation or pleural effusion . Bibasilar atelectatic changes . 2 . No fracture identified . Please note , however , the chest radiograph is not optimal for evaluation of bony detail . If clinical concern persists , consider CT chest for further evaluation .