Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are low , decreased from ___ . Left basilar opacities may represent atelectasis in the setting of low lung volumes although infection is not excluded in the appropriate clinical context . There is no pleural effusion or pneumothorax . The pulmonary vasculature is not engorged . The cardiomediastinal and hilar contours are within normal limits . Patient is status post median sternotomy with multiple intact sternal wires . The thoracic aorta is mildly tortuous . Multiple mediastinal surgical clips are compatible with prior CABG surgery . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes with left basilar atelectasis versus developing infection . Conventional radiographs including a lateral radiograph is recommended when the patient is able .