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Q.1) If a material has a longitudinal relaxation time constant T1 = 200 ms, what will...

Q.1) If a material has a longitudinal relaxation time constant T1 = 200 ms, what will the MR signal, S, be 200 ms after an RF pulse has flipped (nutated) the bulk magnetization into the transverse plane?

Q.2) A sample of liver tissue has a longitudinal relaxation time constant T1 of 500 ms and a transverse relaxation time constant T2 of 40 ms.

What will the MR signal be?

a) 40 ms after an RF pulse?

b) 500 ms after an RF pulse?

science   Advanced-Physics   
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