Question: A 72-year-old woman with type 2 diabetes and chronic renal failure in stage 5. If a pulmonary thromboembolism is suspected, indicate which diagnostic test would be contraindicated: 
 Options:  <1> Transthoracic echocardiogram. <2> Pulmonary scintigraphy <3> Pulmonary angioCT. <4> Electrocardiogram. <5> Chest x-ray.
3