jing cai
Fri. 20 Oct.06,
15:47
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You are right! It is called the hyperpolarized nobel gases, mostly Helium-3 and Xenon-129. They are many centers around the world are conducting such experiments. Many techniques using the gas have been developed to investigate pulmonary pathphysiological changes such as ventilation, diffusion, elastis, etc. As an example, you can go the below link for detailed information:
http://imaging.med.virginia.edu/hyperpolarized/index.htm
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