ook different than some tumors a stunner Chi 142 relaxation times and we emphasize they had in our different types about all sequences by dialing in parameters truce to make those more t1 or t2 -weighted for example we know that the reason uh those tissues look differently is that they have inherently  Cerebrrin different relaxation rate r1 Archie with that capital are there and that's just the inverse of those she want chichi relaxation rates now one thing that I don't think it’s captured quite so much attention in traditional teaching is the concept of relax effete real activity is indicated with a little our one brittle are to you and this is really uh a measure mentor quantification of how effectively and exogenously I Minister contrast agent in this case get a lenient enhances the relaxation rate a car one or Archie in other words it's measure out bang for.

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