Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . No focal consolidation , pleural effusion , or pneumothorax is seen . Mild indentation on the trachea may be secondary to adjacent thyroid nodule . Heart and mediastinal contours are within normal limits . Spinal degenerative changes appear similar , but are incompletely evaluated .
    OUTPUT:
    
No radiographic evidence for acute cardiopulmonary process . Indentation of the trachea may be secondary to thyroid nodule ; clinical correlation is recommended . Discussed with Dr . ___ by Dr . ___ ___ by phone at approximately 8 : 15 a .m . on ___ .