How we can use this formula
M = M0[1-(exp-TR/T1)
M = M0 exp(-TE/T2)
can anyone explain in detail
Thanks in advance
Hello
T1:
1. Please draw a graph of signal intensity (IS) MR (brightness of the area in the MR image) vs. TR [ms]
2. Please determine the time TR at which IS = 63% of the maximum value - then T1=TR in the exponent of the formula
But for T1 to be properly defined, the series of images must be defined for TR >> T1 (TR=5* expected value of T1).
T2:
1. Please draw a graph of signal intensity (IS) MR (brightness of the area in the MR image) vs. TE [ms]
2. Please determine the time TE at which IS = 37% of the maximum value - then T2=TE in the exponent of the formula
I propose to normalize and approximate the data. Then compute the inverse function g(x)=f(x)^-1 (not g(x)=1/f(x)) . Then, substituting the values 0.63 for T1 and 0.37 for T2, you will get the times you are looking for. MATLAB is perfect for these purposes.
Adrian Truszkiewicz Thank you for your answer, I have like 6 concentration sample for each concentration we need to do seperately ?
Hello
6 samples with different concentrations = 6 curves on the graph
Probably different concentrations will have different T1 and T2
I don't know what system you have, but maybe you can put all 6 samples in the magnet at the same time and then just read the ROIs from the images.
- Badges
- Science topic