Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is limited due to low inspiratory lung volumes and patient rotation . The patient is status post median sternotomy and CABG . Low lung volumes accentuates the size of the cardiac silhouette which is likely borderline enlarged . Atherosclerotic calcifications of the aortic knob are present . There is crowding of the bronchovascular structures but no overt pulmonary edema is noted . Patchy opacities in the lung bases likely reflect atelectasis . No large pleural effusion or pneumothorax is identified . No acute osseous abnormality seen . Degenerative changes of both glenohumeral joint are noted .
    OUTPUT:
    
Limited study due to low lung volumes and patient rotation . Probable bibasilar atelectasis , but would recommend repeat PA and lateral radiographs with improved inspiratory effort when the patient is able to for further assessment of the lung bases .